larnax vs ossuary

larnax

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

ossuary

noun
  • A container, receptacle, or building, such as an urn or vault, for holding the bones of the dead. 

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