boot hill vs mortuary

boot hill

mortuary

adj
  • Of, or relating to death or a funeral; funereal. 

noun
  • A place where dead bodies are stored prior to burial or cremation. 

  • A sort of ecclesiastical heriot, a customary gift claimed by, and due to, the minister of a parish on the death of a parishioner. 

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