evaporation vs sustentation

evaporation

noun
  • The process in which all or a portion of liquid (in a container) is turned into vapour, in order to increase the concentration of solid matter in the mixture. 

  • The process of a liquid converting to the gaseous state. 

sustentation

noun
  • The aggregate of the functions by which a living organism is maintained in a normal condition of weight and growth. 

  • The act or the result of sustaining; sustainment. 

  • The scheme by which the ministers of the Free Church of Scotland are supported by voluntary contributions not local or congregational, but with a national altruism or solidarity paid into a great central fund, out of which equal stipends are paid to all alike. 

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