lunchroom vs tea shop

lunchroom

noun
  • A diner or small restaurant that serves lunch. 

  • A room designated as a place to eat lunch. 

tea shop

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

  • A shop that sells tea. 

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