commutation vs tour

commutation

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

  • 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. 

  • Substitution of one thing for another; interchange. 

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

tour

noun
  • A journey through a particular building, estate, country, etc. 

  • A trip taken to another country in which several matches are played. 

  • A set of competitions which make up a championship. 

  • A tour of duty. 

  • A circuit of snooker tournaments 

  • A street and road race, frequently multiday. 

  • A guided visit to a particular place, or virtual place. 

  • A journey through a given list of places, such as by an entertainer performing concerts. 

  • A closed trail. 

verb
  • To make a journey 

  • To make a circuit of a place 

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