Thanks to Brandon for the meme.

684 [mikeh@gideon]>history | awk '{print $2}' | awk 'BEGIN {FS="|"} {print $1}' | \\
sort | uniq -c | sort -nr | head -10

69 cd
64 l
51 time
31 python
28 make
23 matrix
19 sudo
17 less
13 ./getdistance.py
10 sqlite3