diff --git a/Readme.md b/Readme.md
index 848c612..4f764fe 100644
--- a/Readme.md
+++ b/Readme.md
@@ -37,4 +37,5 @@ sed  's/^(#|$|\s+#.*)//g'  /etc/profile > profile
 ## Sed
 ```bash
 history  | awk '{print $4}' | sort  | uniq -c | sort -n
+history  | awk '{cmd[$4]++};END{ for (ptr in cmd) print ptr, cmd[ptr] }' | sort -k2 -n
 ```