cable car vs railcar

cable car

noun
  • 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. 

  • A hanging carriage or car for transporting people or cargo 

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

railcar

noun
  • A powered single railway vehicle designed for passenger transport, with a driver's cab in both ends; Not to be confused with motor coach/motorcar, which is a powered railway vehicle capable to haul a train. 

  • Any unpowered railway vehicle 

  • A self-propelled railway vehicle for passengers, similar to a bus. 

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