acerbate vs repulse

acerbate

verb
  • To exasperate; to irritate. 

  • To make bitter or sour. 

adj
  • Embittered; having a sour disposition or nature. 

repulse

verb
  • To cause revulsion in. 

  • To repel or drive back. 

  • To reject or rebuff. 

noun
  • the act of repulsing or the state of being repulsed 

  • refusal, rejection or repulsion 

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