commutation vs junket

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. 

junket

noun
  • A pleasure-trip; a journey made for feasting or enjoyment, now especially a trip made ostensibly for business but which entails merrymaking or entertainment. 

  • A type of cream cheese, originally made in a rush basket; later, a food made of sweetened curds or rennet. 

  • A press junket. 

  • A gaming room for which the capacity and limits change daily, often rented out to private vendors who run tour groups through them and give a portion of the proceeds to the main casino. 

  • A feast or banquet. 

verb
  • To go on a junket; to travel. 

  • To regale or entertain with a feast. 

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