dispersal vs dissolution

dispersal

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

  • A dispersal prison. 

dissolution

noun
  • The quality of being dissolute. 

  • The termination of an organized body or legislative assembly, especially a formal dismissal. 

  • Dissolving, or going into solution. 

  • Disintegration, or decomposition into fragments. 

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