crack up vs josh

crack up

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. 

adj
  • Funny; hilarious 

josh

verb
  • To make or exchange good-natured jokes. 

  • To tease someone in a kindly or friendly fashion. 

noun
  • An instance of good-natured banter. 

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