cable car vs trolley car

cable car

noun
  • A streetcar moved by gripping to rotating loop of cable running along the track. 

  • A hanging carriage or car for transporting people or cargo 

  • Any passenger vehicle attached to a moving cable for propulsion, and guided by some form of rails, on a specially-built track not in a street. 

trolley car

noun
  • An electric streetcar or tram with a trolley pole for collecting electric current. 

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