boule vs play on

boule

verb
  • To shape (a piece of dough) into a ball. 

noun
  • A single-crystal ingot produced by synthetic means. 

  • A round loaf of bread. 

  • A round piece of dough. 

  • A through-sawn log with the slices restacked in the order and orientation they originally had in the log, usually with waney edges. 

  • A council of citizens in Ancient Greece 

  • One of the bowls used in the French game of boules. 

play on

verb
  • to hit the ball into his own wicket, thus being out bowled 

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

  • to let the game continue after a foul has been committed, because the situation is advantageous to the team who would be awarded a foul. 

  • To exploit by exacerbating. 

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