dissonance vs harmony

dissonance

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

  • A harsh, discordant combination of sounds. 

  • An instance of disharmony or disjunction; a clash. 

  • A state of disagreement or conflict. 

harmony

noun
  • Two or more notes played simultaneously to produce a chord. 

  • A literary work which brings together or arranges systematically parallel passages of historians respecting the same events, and shows their agreement or consistency. 

  • A pleasing combination of elements, or arrangement of sounds. 

  • The relationship between two distinct musical pitches (musical pitches being frequencies of vibration which produce audible sound) played simultaneously. 

  • The academic study of chords. 

  • Agreement or accord. 

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