Save keystrokes frequency

[dacap]

Along command frequency we could record keystrokes frequency. Check for "this-command-keys" in "keyfreq-pre-command-hook" function.

More information:
http://www.gnu.org/software/emacs/manual/html_node/elisp/Command-Overview.html
http://www.gnu.org/software/emacs/manual/html_node/elisp/Command-Loop-Info.html

[DevJac]

It would be especially useful to be able to combine the command the the invoking keystroke. I want to know that common commands are being invoked with easy keystrokes.