exasperate vs pacify

exasperate

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

pacify

verb
  • To appease (someone). 

  • To bring peace to (a place or situation), by ending war, fighting, violence, anger or agitation. 

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