conflict vs dissonance

conflict

noun
  • A clash or disagreement, often violent, between two or more opposing groups or individuals. 

  • An incompatibility, as of two things that cannot be simultaneously fulfilled. 

verb
  • To overlap (with), as in a schedule. 

  • To be at odds (with); to disagree or be incompatible 

dissonance

noun
  • An instance of disharmony or disjunction; a clash. 

  • A harsh, discordant combination of sounds. 

  • Conflicting notes that are not overtones of the note or chord sounding. 

  • A state of disagreement or conflict. 

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