KeyCounter can keep track of how many times you press any key.

We could use this for our Logitech slim keyboards as they always break a different single key and we'd sure like to know if we even use it. I mean, we never use the number pad so how does the number 3 break? Anyway...

The author developed KeyCounter for personal use and decided to release it. You can easily add any key to a list or even pick a predefined keystroke group. Click start to start monitoring and stop to stop. Keyboard strokes are shown at the bottom.

That's about it. If you're looking to track key clicks, it doesn't get much easier than KeyCounter.