crack up vs prang

crack up

verb
  • To crash an aircraft or automobile. 

  • To cause to laugh heartily. 

  • To become insane; to suffer a mental breakdown. 

  • To laugh heartily. 

  • To cry up; to extol. 

adj
  • Funny; hilarious 

prang

verb
  • To crash; to have an accident while controlling a vehicle. 

  • To damage (the vehicle one is driving) in an accident; to have a minor collision with (another motor vehicle). 

noun
  • A type of tower or spire featured in some Buddhist temples of Cambodia and Thailand. 

  • An accident involving a motor vehicle, typically minor and without casualties. 

  • Crack cocaine. 

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