accord vs harmony

accord

noun
  • Agreement or harmony of things in general. 

  • Voluntary or spontaneous impulse to act. 

  • Agreement or concurrence of opinion, will, or action. 

  • A distinctive mixture of fragrances or the odor thereof. 

  • An agreement between parties in controversy, by which satisfaction for an injury is stipulated, and which, when executed, prevents a lawsuit. 

  • An international agreement. 

  • A harmony in sound, pitch and tone; concord. 

verb
  • To agree or correspond; to be in harmony; to be concordant. 

  • To grant as suitable or proper; to concede or award. 

  • To bring (people) to an agreement; to reconcile, settle, adjust or harmonize. 

  • To make to agree or correspond; to suit one thing to another; to adjust. 

  • To agree in pitch and tone. 

harmony

noun
  • Agreement or accord. 

  • 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. 

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

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