aggravate vs mollify

aggravate

verb
  • To exasperate; to provoke or irritate. 

  • To make (an offence) worse or more severe; to increase in offensiveness or heinousness. 

  • To make worse; to exacerbate. 

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 aggravate and mollify occurred in a corpus of books? (source: Google Ngram Viewer )