amphora vs urn

amphora

noun
  • A Roman unit of liquid measure reckoned as the volume of 80 Roman pounds of wine and equivalent to about 26 L although differing slightly over time. 

  • A large vessel, especially a thin-necked clay vat used in ancient Greece and Rome for storing and transporting wine and oil. 

  • A Roman unit of ship capacity, similar to tonnage. 

  • A lower valve of a fruit that opens transversely. 

urn

noun
  • A measure of capacity for liquids, containing about three gallons and a half, wine measure. It was half the amphora, and four times the congius. 

  • A vase with a footed base. 

  • A metal vessel for serving tea or coffee. 

  • A vessel for the ashes or cremains of a deceased person. 

  • Any place of burial; the grave. 

  • A hollow body shaped like an urn, in which the spores of mosses are contained; a spore case; a theca. 

verb
  • To place in an urn. 

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