shit bowl vs shitter

shit bowl

noun
  • A bowl used for defecation: a chamber pot or toilet. 

shitter

noun
  • A toilet or lavatory; an outhouse. 

  • One who defecates. 

  • The anus. 

  • Someone lacking skill, especially in a video game. 

  • An objectionable person or thing. 

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