bowling vs bowls

bowling

noun
  • A game played by rolling a ball down an alley and trying to knock over a triangular group of ten pins; ten-pin bowling/five-pin bowling 

  • Candlepin bowling. 

  • The action of propelling the ball towards the batsman. 

  • A particular style of walking associated with urban street culture. 

  • Any of several similar games played indoors or outdoors. 

  • The action of the verb bowl. 

  • Road bowling. 

bowls

noun
  • A ball used in the game of bowls 

  • A precision sport where the goal is to roll biased balls (weighted on one side, and called bowls) closer to a smaller white ball (the jack or kitty) than one's opponent is able to do. 

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