After reading sdog’s last blog entry with the same title as this one, I’d try the same command on my laptop.
Here is the result of
history|awk '{print $2}'|awk 'BEGIN {FS="|"} {print $1}'|sort|uniq -c|sort -rn|head -10
132 ssh
84 exit
52 su
35 telnet
32 cd
25 ls
19 grep
15 man
13 scp
13 ping
