crack up vs go nutty

crack up

adj
  • Funny; hilarious 

verb
  • To cause to laugh heartily. 

  • To become insane; to suffer a mental breakdown. 

  • To crash an aircraft or automobile. 

  • To laugh heartily. 

  • To cry up; to extol. 

go nutty

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