copilot vs trailer

copilot

noun
  • A backup or assistant pilot of an aircraft. 

verb
  • To serve as relief or assistant pilot. 

trailer

noun
  • A furnished vehicle towed behind another, and used as a dwelling when stationary; a caravan; a camper. 

  • A short blank segment of film at the end of a reel, for convenient insertion of the film in a projector. 

  • The last part of a packet, often containing a check sequence. 

  • The final record of a list of data items, often identified by a key field with an otherwise invalid value that sorts last alphabetically (e.g., “ZZZZZ”) or numerically (“99999”); especially common in the context of punched cards, where the final card is called a trailer card. 

  • A prefabricated home that could be towed to a new destination but is typically permanently left in an area designated for such homes. 

  • A preview of a film, video game or TV show. 

  • An unpowered wheeled vehicle, not a caravan or camper, that is towed behind another, and used to carry equipment, etc, that cannot be carried in the leading vehicle. 

  • Part of an object which extends some distance beyond the main body of the object. 

  • Someone who or something that trails. 

verb
  • To load on a trailer or to transport by trailer. 

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