institute vs polytechnic

institute

noun
  • An institution of learning; a college, especially for technical subjects 

  • An organization founded to promote a cause 

  • The person to whom an estate is first given by destination or limitation. 

  • The building housing such an institution 

verb
  • To invest with the spiritual charge of a benefice, or the care of souls. 

  • To nominate; to appoint. 

  • To begin or initiate (something); to found. 

polytechnic

noun
  • A three-year post-secondary vocational training institute, equivalent of community college in the U.S. or TAFE in Australia. 

adj
  • that teaches applied arts, sciences, technology, engineering and other academic subjects 

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