pratfall vs shart

pratfall

verb
  • To fall on to the buttocks. 

noun
  • A fall onto the buttocks. 

  • A staged trip or fall, often for comedic purposes. 

  • A humiliating mistake. 

shart

verb
  • To unintentionally defecate due to relaxing the anus to flatulate. 

noun
  • An instance of sharting. 

  • The resulting excrement from sharting. 

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