boff vs king hit

boff

noun
  • A hit or smack. 

  • 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. 

verb
  • to have sexual intercourse (with someone) 

  • To hit; to strike. 

king hit

noun
  • A blow intended to incapacitate in one hit, often delivered without warning. 

verb
  • To attack a victim and knock them unconscious with a single punch. 

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