boff vs bop

boff

verb
  • to have sexual intercourse (with someone) 

  • To hit; to strike. 

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. 

bop

verb
  • To have sex. 

  • To walk the streets while socializing. 

  • To dance to this music, or any sort of music with a marked beat. 

  • To strike gently or playfully. 

  • To fellate. 

noun
  • A very light smack, blow or punch. 

  • A party hosted by a college's JCR or MCR. 

  • A style of improvised jazz from the 1940s. 

  • A good song. 

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