bowling vs bowling ball

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. 

bowling ball

noun
  • A solid ball used in the sport of bowling, with finger holes allowing it to be picked up. 

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