pratfall vs whank

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. 

whank

verb
  • To beat; to thrash; to whip; to lash. 

  • To cut, especially to cut off a large portion. 

noun
  • A strike with the fist; a blow; a knock. 

  • A large portion, slice or lump. 

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