I have some variables set to control my history which have been added at some point, but since my history is quite big I think a part of it hasn't been affected by those variables.

Laptop

tom@breek ~ $ history | \
   awk '{a[$2]++ } END{for(i in a){print a[i] " " i}}' | \
   sort -rn | head
994 cd
889 svn
556 ls
380 grep
377 eix
315 ssh
305 tree
286 rm
259 ll
257 halt
tom@breek ~ $ grep HIST ~/.bashrc
export HISTFILE=~/.bash/bash_history
# While we are on it, expand HISTSIZE...
export HISTSIZE=10000
export HISTIGNORE="ls:ll:bg:fg:startx:halt"
export HISTCONTROL=ignoredups
breek ~ # history | \
    awk '{a[$2]++ } END{for(i in a){print a[i] " " i}}' | \
    sort -rn | head
410 emerge
197 /etc/init.d/bitlbeed
168 cd
162 ls
162 ll
161 vi
99 mount
96 eix
86 time
84 grep
breek ~ # grep HIST ~/.bashrc
# While we are on it, expand HISTSIZE...
export HISTSIZE=10000
export HISTIGNORE="ls:ll:bg:fg"

Server

tom@azatom.info ~ $ history | \
   awk '{a[$2]++ } END{for(i in a){print a[i] " " i}}' | \
   sort -rn | head
986 cd
526 svn
490 ls
488 vi
474 ll
411 rm
380 grep
225 su
221 view
214 find
tom@azatom.info ~ $ grep HIST ~/.bashrc
# While we are on it, expand HISTSIZE...
export HISTSIZE=10000
export HISTIGNORE="ls:ll:bg:fg"