flagon vs slop-bowl

flagon

noun
  • A large vessel resembling a jug, usually with a handle, lid, and spout, for serving drinks such as cider or wine at a table; specifically (Christianity), such a vessel used to hold the wine for the ritual of Holy Communion. 

  • A flagon and its contents; as much as fills such a vessel. 

slop-bowl

noun
  • Part of a traditional tea set, used to empty the cold tea and dregs in tea cups before refilling with hot tea. Usually pottery or silver. 

How often have the words flagon and slop-bowl occurred in a corpus of books? (source: Google Ngram Viewer )