coffee shop vs dining room

coffee shop

noun
  • A small café or restaurant typically selling light refreshments along with coffee-based drinks. 

  • Used other than figuratively or idiomatically: see coffee, shop. 

  • A café-like establishment selling marijuana in the Netherlands. 

dining room

noun
  • A room, in a home or hotel, where meals are eaten. Some restaurants provide private dining rooms for hire, away from the main public eating areas. 

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