chamber pot vs slop-bowl

chamber pot

noun
  • A container used for urination and defecation, particularly those used in early modern towns before the advent of the flush toilet. 

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