pizza slow (high quality)

What’s the etymology of ‘learnings’? Are there other gerunds that’ve been re-nouned the same way? Please use “learnings” in your answer.

Proximate posts in the Twitter collection
newer Twitter post from September 28, 2015, 648523510852091904 28 September 2015
this post Twitter post from September 28, 2015, 648521828059578369 28 September 2015
older Twitter post from September 26, 2015, 647819825733988352 26 September 2015
Proximate posts in the General collection
newer Twitter post from September 28, 2015, 648523510852091904 28 September 2015
this post Twitter post from September 28, 2015, 648521828059578369 28 September 2015
older nevver: Calvin and Hobbes 28 September 2015