acerbate vs repugnant

acerbate

adj
  • Embittered; having a sour disposition or nature. 

verb
  • To exasperate; to irritate. 

  • To make bitter or sour. 

repugnant

adj
  • Offensive or repulsive; arousing disgust or aversion. 

  • Opposed or in conflict. 

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