exasperate vs ruffle some feathers

exasperate

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

ruffle some feathers

verb
  • To cause a disturbance; to arouse resentment, anger, or concern. 

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