exasperate vs harsh one's mellow

exasperate

verb
  • To tax the patience of; irk, frustrate, vex, provoke, annoy; to make angry. 

harsh one's mellow

verb
  • To spoil one's good mood or to annoy one. 

How often have the words exasperate and harsh one's mellow occurred in a corpus of books? (source: Google Ngram Viewer )