coincidence vs harmony

coincidence

noun
  • Of objects, the property of being coincident; occurring at the same time or place. 

  • A coincidence point. 

  • A fixed point of a correspondence; a point of a variety corresponding to itself under a correspondence. 

  • Of events, the appearance of a meaningful connection when there is none. 

harmony

noun
  • 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. 

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

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