acerbate vs get on one’s nerves

acerbate

adj

  • Embittered; having a sour disposition or nature. 

verb

  • To exasperate; to irritate. 

  • To make bitter or sour. 

get on one’s nerves

How often have the words acerbate and get on one’s nerves occurred in a corpus of books? (source: Google Ngram Viewer )