landau vs limousine

landau

noun
  • A style of automobile based around the design of landau carriages. 

  • A type of lightweight, four-wheeled carriage in which the front and back passenger seats face each other. 

limousine

noun
  • A luxury sedan or saloon car, especially one with a lengthened wheelbase or driven by a chauffeur. 

  • An automobile for transportation to or from an airport, including sedans, vans, and buses. 

  • An automobile with such a body. 

  • An automobile body with seats and permanent top like a coupe, and with the top projecting over the driver and a projecting front. 

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