old town vs water closet

old town

noun

  • Used other than figuratively or idiomatically: see old, town. 

  • The historic district of a city or town. 

water closet

noun

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

  • A flush toilet itself. 

  • A room containing a flush toilet. 

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