chapter house vs convent

chapter house

noun
  • A building used by a sorority or fraternity as a residence or meeting place. 

  • A building attached to a cathedral, church, or monastery and used as a meeting place. 

convent

noun
  • The buildings and pertaining surroundings in which such a community lives. 

  • A Christian school. 

  • A religious community whose members (especially nuns) live under strict observation of religious rules and self-imposed vows. 

  • A gathering of people lasting several days for the purpose of discussing or working on topics previously selected. 

  • A coming together; a meeting. 

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