Maybe something like (using the examples above):
Scholar:
Learn three new skills
Focus in training/developing four skills already known
PC spends time learning/studying (I say learning because some PCs play illiterate if I am not mistaken and there are many ways to learn.

Brawler:
Get into a bar brawl
Get into a fight without using any weapons
Throw a table and smash a chair
So to me instead of trying to quantify things what we are trying to do is develop something further. Just my opinion anyway since everyone seems to be focusing on something which is entirely subjective and unstable.