boff vs skud

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. 

skud

verb
  • To hit. 

  • To speed. 

  • To skim. 

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