history | awk '{CMD[$2]++;count++;}END { for (a in CMD)print CMD[a] " " CMD[a]/count*100 "% " a;}' | grep -v "./" | column -c3 -s " " -t | sort -nr | nl |  head -n10

The result

     1  188  37.6%  vi
     2  38   7.6%   ls
     3  24   4.8%   cat
     4  22   4.4%   apt-get
     5  12   2.4%   date
     6  11   2.2%   tail
     7  11   2.2%   cd
     8  10   2%     rm
     9  10   2%     man
    10  9    1.8%   basename

It looks like i use vim a lot on my home server. You should try it yourself and see what commands you use the most.

Source: http://linux.byexamples.com

(Include empty lines)
% nl -ba filename

(Left justified number column)
% nl -nln filename