body bag vs larnax

body bag

noun
  • A non-porous bag designed to contain a human body, used for the storage and transport of corpses. 

larnax

noun
  • A small closed coffin, box or cinerary urn often used as a container for human remains in Ancient Greece. 

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