feretory vs morgue

feretory

noun
  • An area of a church where relics are kept. 

  • A receptacle that houses relics of saints. 

morgue

noun
  • A building or room where dead bodies are kept before their proper burial or cremation, (now) particularly in legal and law enforcement contexts. 

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