[ruby] ruby -pe 'gsub(/^.+;| .+$/,"")' ~/.zsh-history | sort | uniq -c | sort -r | head -20

    226 ls
    176 cd
    135 sudo
     60 less
     44 emacs
     37 ruby
     30 screen
     28 ../plagger
     25 synergys
     19 vim
     16 rm
     12 |
     12 date
     12 ./plagger
     11 perl
      9 cd
      9 apt-file
      8 mkdir
      8 ./configure
      7 tar