castling vs interchange

castling

noun
  • A miniature cast or mould. 

  • One that is cast. 

  • The act of constructing a defense structure in Japanese chess in which the king (玉) is positioned in a certain way so that it is protected by pawns (歩) and silver general(s) (銀) and/or gold general(s) (金) often with an additional knight (桂) and lance (香車). 

  • A move in which the king moves two squares towards a rook, and the rook moves to the other side of the king; the action of the verb to castle. 

interchange

noun
  • An act of interchanging. 

  • A connection between two or more lines, services or modes of transport; a station at which such a connection can be made. 

  • A highway junction in which traffic may change from one road to another without crossing a stream of traffic. 

verb
  • to swap or change places 

  • to alternate; to intermingle or vary 

  • to mutually give and receive (something); to exchange 

  • To act as or carry out an interchange (noun, senses 2, 3). 

  • to switch (each of two things) 

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