castling vs transaction

castling

noun
  • One that is cast. 

  • A miniature cast or mould. 

  • 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. 

transaction

noun
  • A social interaction. 

  • A record of the proceedings of a learned society. 

  • An exchange or trade, as of ideas, money, goods, etc. 

  • A deal or business agreement. 

  • The act of conducting or carrying out (business, negotiations, plans). 

  • The transfer of funds into, out of, or from an account. 

  • An atomic operation; a message, data modification, or other procedure that is guaranteed to perform completely or not at all (e.g. a database transaction). 

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