bowls vs pottery

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. 

pottery

noun
  • The potter's craft or art: making vessels from clay. 

  • Fired ceramic wares that contain clay when formed. 

  • A potter's shop or workshop, where pottery is made. 

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