dining car vs saloon

dining car

noun
  • A carriage on a train that functions as a restaurant. 

saloon

noun
  • the part of a rail carriage or multiple unit containing seating for passengers. 

  • The cabin area of a boat or yacht devoted to seated relaxation, often combined with dining table. 

  • A tavern, especially in an American Old West setting. 

  • A barbershop (store offering haircuts). 

  • The most common body style for modern cars, with a boot or trunk. 

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