tenpin bowling vs tenpins

tenpin bowling

noun
  • A sport where players roll a ball down a wooden pathway and try to knock down as many of the ten target pins as possible. 

tenpins

noun
  • A game, a form of bowling, played with ten pins as the target. 

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