calefactory vs guildhall

calefactory

noun
  • The room or building in a monastery holding its communal fire, kept warm and used as a sitting room. 

  • A warming pan, or similar device used by a priest to warm his hands 

adj
  • warming 

guildhall

noun
  • A hall where a guild or corporation usually assembles. 

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