gammon vs get it on

gammon

verb
  • To beat by a gammon (without the opponent bearing off a stone). 

  • To lash with ropes (on a ship). 

  • To cure bacon by salting. 

noun
  • Backgammon (the game itself). 

  • A rope fastening a bowsprit to the stem of a ship (usually called a gammoning). 

  • A victory in backgammon achieved when the opponent has not borne off a single stone. 

  • A cut of quick-cured pork leg. 

  • A middle-aged or older right-wing, reactionary white man, or such men collectively. 

get it on

verb
  • To engage in a fight. 

  • To have sex. 

  • To hurry up; to get a move on. 

  • Used other than figuratively or idiomatically: see get, it, on. 

How often have the words gammon and get it on occurred in a corpus of books? (source: Google Ngram Viewer )