gistfile1.txt

 / _ / X < ruby -pe 'gsub(/^.+;| .+$/,"")' ~/.zhistory* | sort | uniq -c | sort -r | head -20 
2245 ls
2060 git
 895 cd
 762 vim
 529 perl
 404 exit
 356 curl
 312 ack
 136 sudo
 111 ssh
 105 make
  92 cat
  90 screen
  90 man
  72 mysql5
  68 mv
  59 port
  55 g++
  53 svn
  51 rm