boff vs whiplash

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. 

whiplash

noun
  • The lash of a whip. 

  • An injury to the upper spine connected to a violent jerk of the head in either a backward or forward or side to side direction, resembling the motion of a whip. 

  • An abrupt and unexpected change, or the resulting feeling of shock. 

verb
  • To jerk back and forth; to buffet. 

  • To lash as if with a whip. 

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