chamber pot vs latrine

chamber pot

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

latrine

noun
  • Any facility or device used for urination or defecation, whether toilet, lavatory, or outhouse. 

  • An open trench or pit used for urination and defecation. 

How often have the words chamber pot and latrine occurred in a corpus of books? (source: Google Ngram Viewer )