liquefaction vs solution

liquefaction

noun
  • The liquid or semiliquid that results from this process. 

  • Process of being, or state of having been, made liquid (from either a solid or a gas) 

solution

noun
  • The act of dissolving, especially of a solid by a fluid; dissolution. 

  • A homogeneous mixture, which may be liquid, gas or solid, formed by dissolving one or more substances. 

  • An act, plan or other means, used or proposed, to solve a problem. 

  • An answer to a problem. 

  • A product, service or suite thereof, especially software. 

verb
  • To treat with a solution. 

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