acerbate vs shake up

acerbate

verb
  • To make bitter or sour. 

  • To exasperate; to irritate. 

adj
  • Embittered; having a sour disposition or nature. 

shake up

verb
  • To upset or distress (a person). 

  • To agitate by shaking. 

  • To reorganize, to make reforms in. 

  • To restore to its original shape by shaking. 

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