diff --git a/doc/fix_ave_atom.txt b/doc/fix_ave_atom.txt
index 06a1e2d5af..de82b3a82e 100644
--- a/doc/fix_ave_atom.txt
+++ b/doc/fix_ave_atom.txt
@@ -71,8 +71,8 @@ that are a multiple of {Nfreq}.  The average is over {Nrepeat}
 quantities, computed in the preceding portion of the simulation every
 {Nevery} timesteps.  {Nfreq} must be a multiple of {Nevery} and
 {Nevery} must be non-zero even if {Nrepeat} is 1.  Also, the timesteps
-contributing to the average value cannot overlap, i.e. Nfreq >
-(Nrepeat-1)*Nevery is required.
+contributing to the average value cannot overlap, 
+i.e. Nrepeat*Nevery can not exceed Nfreq. 
 
 For example, if Nevery=2, Nrepeat=6, and Nfreq=100, then values on
 timesteps 90,92,94,96,98,100 will be used to compute the final average
diff --git a/doc/fix_ave_chunk.txt b/doc/fix_ave_chunk.txt
index 7ba5269539..e1d23477c8 100644
--- a/doc/fix_ave_chunk.txt
+++ b/doc/fix_ave_chunk.txt
@@ -147,8 +147,8 @@ that are a multiples of {Nfreq}.  The average is over {Nrepeat}
 quantities, computed in the preceding portion of the simulation every
 {Nevery} timesteps.  {Nfreq} must be a multiple of {Nevery} and
 {Nevery} must be non-zero even if {Nrepeat} is 1.  Also, the timesteps
-contributing to the average value cannot overlap, i.e. Nfreq >
-(Nrepeat-1)*Nevery is required.
+contributing to the average value cannot overlap, 
+i.e. Nrepeat*Nevery can not exceed Nfreq. 
 
 For example, if Nevery=2, Nrepeat=6, and Nfreq=100, then values on
 timesteps 90,92,94,96,98,100 will be used to compute the final average
diff --git a/doc/fix_ave_histo.txt b/doc/fix_ave_histo.txt
index c580987c93..39003363dd 100644
--- a/doc/fix_ave_histo.txt
+++ b/doc/fix_ave_histo.txt
@@ -127,9 +127,9 @@ histogram.  The final histogram is generated on timesteps that are
 multiple of {Nfreq}.  It is averaged over {Nrepeat} histograms,
 computed in the preceding portion of the simulation every {Nevery}
 timesteps.  {Nfreq} must be a multiple of {Nevery} and {Nevery} must
-be non-zero even if {Nrepeat} is 1.  Also, the timesteps contributing
-to the histogram cannot overlap, i.e. Nfreq > (Nrepeat-1)*Nevery is
-required.
+be non-zero even if {Nrepeat} is 1.  Also, the timesteps
+contributing to the histogram value cannot overlap, 
+i.e. Nrepeat*Nevery can not exceed Nfreq. 
 
 For example, if Nevery=2, Nrepeat=6, and Nfreq=100, then input values
 on timesteps 90,92,94,96,98,100 will be used to compute the final
diff --git a/doc/fix_ave_spatial.txt b/doc/fix_ave_spatial.txt
index 5c2f28f8da..fbbd48453d 100644
--- a/doc/fix_ave_spatial.txt
+++ b/doc/fix_ave_spatial.txt
@@ -142,8 +142,8 @@ that are a multiples of {Nfreq}.  The average is over {Nrepeat}
 quantities, computed in the preceding portion of the simulation every
 {Nevery} timesteps.  {Nfreq} must be a multiple of {Nevery} and
 {Nevery} must be non-zero even if {Nrepeat} is 1.  Also, the timesteps
-contributing to the average value cannot overlap, i.e. Nfreq >
-(Nrepeat-1)*Nevery is required.
+contributing to the average value cannot overlap, 
+i.e. Nrepeat*Nevery can not exceed Nfreq. 
 
 For example, if Nevery=2, Nrepeat=6, and Nfreq=100, then values on
 timesteps 90,92,94,96,98,100 will be used to compute the final average
diff --git a/doc/fix_ave_spatial_sphere.txt b/doc/fix_ave_spatial_sphere.txt
index 65d078b8bf..5d9386d9c2 100644
--- a/doc/fix_ave_spatial_sphere.txt
+++ b/doc/fix_ave_spatial_sphere.txt
@@ -110,9 +110,10 @@ the average.  The final averaged quantities are generated on timesteps
 that are a multiples of {Nfreq}.  The average is over {Nrepeat}
 quantities, computed in the preceding portion of the simulation every
 {Nevery} timesteps.  {Nfreq} must be a multiple of {Nevery} and
-{Nevery} must be non-zero even if {Nrepeat} is 1.  Also, the timesteps
-contributing to the average value cannot overlap, i.e. Nfreq >
-(Nrepeat-1)*Nevery is required.
+{Nevery} must be non-zero even if {Nrepeat} is 1.  
+Also, the timesteps
+contributing to the average value cannot overlap, 
+i.e. Nrepeat*Nevery can not exceed Nfreq. 
 
 For example, if Nevery=2, Nrepeat=6, and Nfreq=100, then values on
 timesteps 90,92,94,96,98,100 will be used to compute the final average
diff --git a/doc/fix_ave_time.txt b/doc/fix_ave_time.txt
index a750c6929b..67d8b7ce6a 100644
--- a/doc/fix_ave_time.txt
+++ b/doc/fix_ave_time.txt
@@ -118,8 +118,8 @@ that are a mlutiple of {Nfreq}.  The average is over {Nrepeat}
 quantities, computed in the preceding portion of the simulation every
 {Nevery} timesteps.  {Nfreq} must be a multiple of {Nevery} and
 {Nevery} must be non-zero even if {Nrepeat} is 1.  Also, the timesteps
-contributing to the average value cannot overlap, i.e. Nfreq >
-(Nrepeat-1)*Nevery is required.
+contributing to the average value cannot overlap, 
+i.e. Nrepeat*Nevery can not exceed Nfreq. 
 
 For example, if Nevery=2, Nrepeat=6, and Nfreq=100, then values on
 timesteps 90,92,94,96,98,100 will be used to compute the final average
diff --git a/doc/fix_reaxc_species.txt b/doc/fix_reaxc_species.txt
index ef8aa5a702..0291cbf985 100644
--- a/doc/fix_reaxc_species.txt
+++ b/doc/fix_reaxc_species.txt
@@ -92,9 +92,10 @@ order.  The species analysis is performed using the average bond-order
 on timesteps that are a multiple of {Nfreq}.  The average is over
 {Nrepeat} bond-order samples, computed in the preceding portion of the
 simulation every {Nevery} timesteps.  {Nfreq} must be a multiple of
-{Nevery} and {Nevery} must be non-zero even if {Nrepeat} is 1.  Also,
-the timesteps contributing to the average bond-order cannot overlap,
-i.e. Nfreq > (Nrepeat-1)*Nevery is required.
+{Nevery} and {Nevery} must be non-zero even if {Nrepeat} is 1.
+Also, the timesteps
+contributing to the average bond-order cannot overlap, 
+i.e. Nrepeat*Nevery can not exceed Nfreq. 
 
 For example, if Nevery=2, Nrepeat=6, and Nfreq=100, then bond-order
 values on timesteps 90,92,94,96,98,100 will be used to compute the
diff --git a/doc/fix_saed_vtk.txt b/doc/fix_saed_vtk.txt
index e9009bd3d2..bcaf874475 100644
--- a/doc/fix_saed_vtk.txt
+++ b/doc/fix_saed_vtk.txt
@@ -74,9 +74,10 @@ average.  The final averaged quantities are generated on timesteps
 that are a multiple of {Nfreq}.  The average is over {Nrepeat}
 quantities, computed in the preceding portion of the simulation every
 {Nevery} timesteps.  {Nfreq} must be a multiple of {Nevery} and
-{Nevery} must be non-zero even if {Nrepeat} is 1.  Also, the timesteps
-contributing to the average value cannot overlap, i.e. Nfreq >
-(Nrepeat-1)*Nevery is required.
+{Nevery} must be non-zero even if {Nrepeat} is 1.
+Also, the timesteps
+contributing to the average value cannot overlap, 
+i.e. Nrepeat*Nevery can not exceed Nfreq. 
 
 For example, if Nevery=2, Nrepeat=6, and Nfreq=100, then values on
 timesteps 90,92,94,96,98,100 will be used to compute the final average