ternion vs treble

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. 

treble

noun
  • Any of the narrow areas enclosed by the two central circles on a dartboard, worth three times the usual value of the segment. 

  • Any high-pitched or shrill voice or sound. 

  • The highest singing voice (especially as for a boy) or part in musical composition. 

  • Three goals, victories, awards etc. in a given match or season. 

  • The highest tuned in a ring of bells. 

  • A person or instrument having a treble voice or pitch; a boy soprano. 

adj
  • Pertaining to the highest singing voice or part in harmonized music; soprano. 

  • High in pitch. 

verb
  • To utter in a treble key; to whine. 

  • To make a shrill or high-pitched noise. 

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