freightwagon vs railcar

freightwagon

noun
  • Any vehicle, such as a cart, wagon, lorry, truck, or boxcar, used for carrying or transporting goods; a cargo truck. 

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 freightwagon and railcar occurred in a corpus of books? (source: Google Ngram Viewer )