acerbate vs fash

acerbate

verb
  • To exasperate; to irritate. 

  • To make bitter or sour. 

adj
  • Embittered; having a sour disposition or nature. 

fash

verb
  • To worry; to bother, annoy. 

  • To trouble oneself; to take pains. 

  • To make something fascist. 

noun
  • A worry; trouble; bother. 

  • The far-right, especially violent far-right demonstrators, collectively. 

  • A fascist, a member of the far-right. 

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