institute vs secondary school

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. 

secondary school

noun
  • School with education level between primary school and university. 

  • In the UK and Ireland, a state school attended between the ages of 11 and 16 or 18. 

  • The federally designated, graduation-separated classification of grades 9–12 (approximately ages 14–18), regardless of whether they are compiled together in one school or separate from the other grades. 

  • Middle school; junior high school; a school that one attends between the ages of 12-17 (equivalent of grades 7-10 in North America, and years 7-10 in Australia). 

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