History meme
(Ultimately from here.)
jet:~ $ history | awk '{a[$2]++} END{for(i in a){printf "%5d\t%s\n ",a[i],i}}' | sort -rn | head 8906 ls 8441 cd 5230 vi 3902 date 3671 fg 1379 svn 1236 make 1143 ssh 1052 mplayer 755 cal
Looks pretty accurate to me, although I’m surprised mplayer is that high in the list.