dissolution vs unification

dissolution

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

  • The quality of being dissolute. 

  • Dissolving, or going into solution. 

  • Disintegration, or decomposition into fragments. 

unification

noun
  • Given two terms, their join with respect to a specialisation order. 

  • The act of unifying. 

  • The state of being unified. 

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