cinerary urn vs larnax

cinerary urn

noun
  • A vessel used to preserve the ashes of the cremated dead. 

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 cinerary urn and larnax occurred in a corpus of books? (source: Google Ngram Viewer )