mazer vs slop-bowl

mazer

noun
  • A large drinking bowl made from such wood; a mazer bowl. 

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 mazer and slop-bowl occurred in a corpus of books? (source: Google Ngram Viewer )