freqkey

 _                   _             
| |                 | |            
| |  ,_    _   __,  | |   _        
|/  /  |  |/  /  |  |/_) |/  |   | 
|__/   |_/|__/\_/|_/| \_/|__/ \_/|/
|\               |\ that's      /| 
|/               |/ "freaky"    \| 

What do

Listens in on all your keypresses (without logging them consecutively, this is not a keylogger) and generates a count that looks somewhat like this:

Started: 2019-03-24 19:05:54.123276 (duration 0:00:20.107664)

Modifiers:
  leftmeta                                                       5
  leftctrl                                                       3
  leftalt                                                        1

Combos:
  k                                                              6
  j                                                              4
  leftmeta + 1                                                   2
  leftmeta + tab                                                 2
  leftctrl + space                                               1
  h                                                              1
  b                                                              1
  leftmeta + 2                                                   1
  leftctrl + t                                                   1
  leftctrl + w                                                   1
  leftalt + 1                                                    1
  space                                                          1

Usage

usage: freqkey [-h] [--out OUT] [--update UPDATE]

optional arguments:
  -h, --help       show this help message and exit
  --out OUT        Output file, defaults to stdout
  --update UPDATE  Update frequency in seconds, defaults to 60

Problems

I've only tested this on an Ubuntu Linux system. It should be cross-platform as it uses the inputs library to collect key events. If you have issues running it, make sure your user is in the input group or, if you must, run it as root.