pissoir vs water closet

pissoir

noun
  • A public urinal typically found in European, especially French, streets. 

water closet

noun
  • A flush toilet itself. 

  • Used other than figuratively or idiomatically: see water, closet. 

  • A room containing a flush toilet. 

How often have the words pissoir and water closet occurred in a corpus of books? (source: Google Ngram Viewer )