acerbate vs raise someone's hackles

acerbate

verb
  • To exasperate; to irritate. 

  • To make bitter or sour. 

adj
  • Embittered; having a sour disposition or nature. 

raise someone's hackles

verb
  • To annoy or anger someone. 

How often have the words acerbate and raise someone's hackles occurred in a corpus of books? (source: Google Ngram Viewer )