ternion vs trine

ternion

noun
  • The number three; three things together; a ternary or triplet. 

  • A section of paper for a book containing three double leaves or twelve pages. 

trine

noun
  • A group of three things. 

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

verb
  • To put in the aspect of a trine. 

adj
  • Triple; threefold. 

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

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