bedpan vs slop-bowl

bedpan

noun
  • A pan used for urination and defecation while in bed, now usually for reasons of medical necessity or convenience. 

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