flush toilet vs slop bucket

flush toilet

noun
  • A toilet that uses water to flush urine and feces through a pipe to another location, typically a sewer main in urban settings or a septic tank elsewhere. 

slop bucket

noun
  • A bucket used for urination and defecation: a chamber pot. 

  • A receptacle used to hold liquid waste. 

  • A pail used to hold food waste for disposal, e.g. by feeding to pigs. 

How often have the words flush toilet and slop bucket occurred in a corpus of books? (source: Google Ngram Viewer )