tea shop vs tearoom

tea shop

noun
  • A cafe where tea is served with light (usually sweet) foods. 

  • A shop that sells tea. 

tearoom

noun
  • A café which serves tea, usually with light food. 

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

  • A room in a workplace set aside for tea breaks, lunch breaks, snacking, etc.; a break room. 

How often have the words tea shop and tearoom occurred in a corpus of books? (source: Google Ngram Viewer )