trine vs trio

trine

noun
  • A group of three things. 

  • An aspect of two astrological bodies when 120° apart. 

adj
  • Triple; threefold. 

  • Denoting the aspect of two celestial bodies which are 120° apart. 

verb
  • To put in the aspect of a trine. 

trio

noun
  • A group of three people or things. 

  • A piece of music written for three musicians. 

  • A group of three musicians. 

  • Any cocktail made with a spirit, a liqueur, and a creamy ingredient. 

  • A passage in the middle of a minuet, frequently in a different key. 

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