touring vs touring car

touring

noun
  • A touring car. 

adj
  • Working for a short time in different places. 

  • Intended for a journey through a country or a region, related to tourism. 

touring car

noun
  • A large open car seating four or more people and having a folding top. An automobile designed for touring; specifically, a roomy car, not a limousine. 

  • A type of race car based on a modified production car, that is a sedan or saloon car. 

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