becalm vs mollify

becalm

verb
  • To deprive (a ship) of wind, so that it cannot move (usually in passive). 

mollify

verb
  • To ease a burden, particularly worry; make less painful; to comfort. 

  • To appease (anger), pacify, gain the good will of. 

  • To soften; to make tender 

How often have the words becalm and mollify occurred in a corpus of books? (source: Google Ngram Viewer )