commutation vs interchange

commutation

noun
  • Substitution of one thing for another; interchange. 

  • The reversal of an electric current. 

  • The change to a lesser penalty or punishment by the State 

  • Substitution, as a means of discriminating between phonemes. 

  • The process or habit of journeying to and from work on a regular basis; commuting. 

  • Specifically, the substitution of one kind of payment for another, especially a switch to monetary payment from obligations of labour. 

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 commutation and interchange occurred in a corpus of books? (source: Google Ngram Viewer )