cenobium vs chapter house

cenobium

noun
  • A monastery, a monastic community. 

chapter house

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

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

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