trey vs trilogy

trey

noun
  • A three penny coin; a thrippence. 

  • The third branch of a deer's antler. 

  • A score of three in cards, dice, or dominoes. 

  • The third bearer of the same personal name in a family, often denoted by suffixed Roman numeral III. 

  • A playing card or die with the rank of three. 

trilogy

noun
  • A set of three works of art that are connected, and that can be seen either as a single work or as three individual works. They are commonly found in literature, film, or video games. 

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