auto vs landau

auto

noun
  • An autorickshaw. 

  • An automobile. 

  • A setting for automatic operation. 

  • A car with an automatic gearbox / transmission. 

  • An automatic gearbox / transmission. 

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. 

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