hehe

flub@signy:~$ history | awk '{a[$2]++ } END{for(i in a){print a[i] " " i}}'|sort -rn |head
79 nosetests
74 ls
46 cd
36 ssh
28 man
22 apt-cache
19 vi
19 ack
17 svn
17 sudo
flub@signy:~$

It must be noted that most of my editing happens in emacs, but that only gets started a few times a day and then stays there (oh and emacs is started from a shortcut icon, not the shell).