fief vs institute

fief

noun
  • Synonym of estate: any land, when considered as a region over which the owner exercises lordly control. 

  • A territory, a domain, an area over which one exercises lordly control, particularly with regard to corporate or governmental bureaucracies. 

  • Land held of a superior, particularly on condition of homage, fealty, and personal service, especially military service. 

institute

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

  • An organization founded to promote a cause 

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

  • 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. 

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