cenacle vs companionship

cenacle

noun
  • A small circle or gathering of specialists (writers etc). 

  • A dining room, especially one on an upper floor (traditionally the room in which the Last Supper took place). 

companionship

noun
  • An organized group of people. 

  • The state of having or being a companion. 

  • The state of being a journeyman. 

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