I saw this on B-List and I am not one to stop the marching hoardes of an internet meme about geeky stuff.
$ history|awk '{a[$2]++} END{for(i in a){printf "%5d\t%s\n",a[i],i}}'|sort -rn|head
103 ls
67 cd
62 vim
48 svn
23 sudo
21 ssh
18 mysql
16 date
13 xrandr
11 mv
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