nub vs stapler

nub

noun
  • A small lump or knob. 

  • a pointing stick 

  • The clitoris. 

  • The essence or core of an issue, argument etc. 

verb
  • To push; to nudge. 

  • To beckon. 

  • To hit the ball weakly. 

stapler

noun
  • A device which binds together sheets of paper by driving a thin metal staple through the sheets and simultaneously folding over the ends of the staple against the back surface of the paper. 

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