boff vs duke

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. 

duke

verb
  • To hit or beat with the fists. 

  • To give cash to; to give a tip to. 

noun
  • The male ruler of a duchy (female equivalent: duchess). 

  • A fist. 

  • A grand duke. 

  • The sovereign of a small state. 

  • A high title of nobility; the male holder of a dukedom. 

  • Any of various nymphalid butterflies of the Asian genera Bassarona and Dophla. 

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