acerbate vs bilious

acerbate

adj
  • Embittered; having a sour disposition or nature. 

verb
  • To exasperate; to irritate. 

  • To make bitter or sour. 

bilious

adj
  • Peevishly ill-humored, irritable or bad tempered; irascible. 

  • Suffering from real or supposed liver disorder, especially excessive secretions of bile. 

  • Of or pertaining to something containing or consisting of bile. 

  • Resembling bile, especially in color. 

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