slop-bowl vs teakettle

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. 

teakettle

noun
  • A vessel used to boil water for tea or other hot beverages. 

verb
  • To make a shrill sound like a boiling teakettle. 

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