acerbate vs infuriate

acerbate

verb
  • To make bitter or sour. 

  • To exasperate; to irritate. 

adj
  • Embittered; having a sour disposition or nature. 

infuriate

verb
  • To make furious or mad with anger; to fill with fury. 

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