harmony vs trouble

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. 

trouble

noun
  • A violent occurrence or event. 

  • A difficulty, problem, condition, or action contributing to such a situation. 

  • A fault or interruption in a stratum. 

  • A malfunction. 

  • Efforts taken or expended, typically beyond the normal required. 

  • Liability to punishment; conflict with authority. 

  • Wife. Clipping of trouble and strife. 

  • A distressing or dangerous situation. 

verb
  • In weaker sense: to bother or inconvenience. 

  • To mentally distress; to cause (someone) to be anxious or perplexed. 

  • To worry; to be anxious. 

  • To take pains to do something. 

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