exasperate vs propitiate

exasperate

verb
  • To tax the patience of; irk, frustrate, vex, provoke, annoy; to make angry. 

propitiate

verb
  • To make propitious or favourable. 

  • To make propitiation. 

  • To conciliate, appease, or make peace with someone, particularly a god or spirit. 

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