dispersal vs liquefaction

dispersal

noun
  • The act or result of dispersing or scattering; dispersion. 

  • A dispersal prison. 

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) 

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