triplicate vs triumvirate

triplicate

adj
  • Made thrice as much; threefold; tripled. 

noun
  • Each of a set of three identical objects or copies. 

  • The making of three identical copies of something. 

verb
  • To triple. 

  • To make three identical copies of something. 

triumvirate

noun
  • An official group of three people, especially a ruling council of three men and particularly (historical) two such councils in Roman history. 

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