backside vs moon

backside

noun
  • The back side of an estate: the backyard and outbuildings behind a main house, especially (UK dialect, euphemistic) an outhouse. 

  • Used other than figuratively or idiomatically: see back, side. 

  • The reverse or opposite of anything. 

  • A person's buttocks. 

adj
  • Used other than figuratively or idiomatically: see back, side. 

  • Approaching an obstacle backward 

moon

noun
  • A crescent-like outwork in a fortification. 

  • A month, particularly a lunar month. 

  • A representation of the moon, usually as a crescent or as a circle with a face; a crescent-shaped shape, symbol, or object. 

  • Any natural satellite of a planet. 

  • The thirty-second Lenormand card. 

  • In hearts, the action of taking all the point cards in one hand. 

  • The eighteenth trump/major arcana card of the Tarot. 

verb
  • To rise in price rapidly or suddenly. 

  • To spend time idly, absent-mindedly. 

  • To gaze at lovingly or in adoration. 

  • To display one's buttocks to, typically as a jest, insult, or protest. 

  • (usually followed by over or after) To fuss over something adoringly; to be infatuated with someone. 

  • To expose to the rays of the Moon. 

  • To shoot the moon. 

  • To adorn with moons or crescents. 

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