landau vs two-seater

landau

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

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

two-seater

noun
  • A vehicle with seats for two people (a driver or pilot and one passenger) 

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