boff vs drub

boff

verb
  • To hit; to strike. 

  • to have sexual intercourse (with someone) 

noun
  • A great success; a hit. 

  • A pupil who works hard; a swot. 

  • A line in a film etc that elicits such a laugh. 

  • A big laugh. 

  • A hit or smack. 

drub

verb
  • To beat (someone or something) with a stick. 

  • To defeat someone soundly; to annihilate or crush. 

  • To forcefully teach something. 

  • To criticize harshly; to excoriate. 

noun
  • Carbonaceous shale; small coal; slate, dross, or rubbish in coal. 

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