men's room vs teahouse

men's room

noun
  • A lavatory intended for use by men, often including urinals in addition to toilets. 

  • Other rooms intended for use by men, as waiting rooms, dressing rooms, locker rooms, etc. 

teahouse

noun
  • a public lavatory, particularly (dated US gay slang) as a meeting place for gay men. 

  • A cafe or restaurant that serves tea, usually with light food. 

How often have the words men's room and teahouse occurred in a corpus of books? (source: Google Ngram Viewer )