tierce vs trio

tierce

noun
  • The third tone of the scale. See mediant. 

  • A measure of capacity equal to a third of a pipe, or a cask or other vessel holding such a quantity; a cask larger than a barrel, and smaller than a hogshead or a puncheon, in which wine or salt provisions, rice, etc., are packed for shipment. 

  • An ordinary that covers the left or right third of the field of a shield or flag. 

  • Synonym of terce: the third canonical hour or its service. 

  • A sequence of three playing cards of the same suit. Tierce of ace, king and queen is called tierce-major. 

  • The third defensive position, with the sword hand held at waist height, and the tip of the sword at head height. 

trio

noun
  • A piece of music written for three musicians. 

  • A group of three musicians. 

  • A group of three people or things. 

  • 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 tierce and trio occurred in a corpus of books? (source: Google Ngram Viewer )