crack up vs yaw-haw

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 

yaw-haw

verb

  • To laugh loudly 

noun

  • A loud, coarse laugh. 

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