dissonance vs tug of war

dissonance

noun
  • A state of disagreement or conflict. 

  • A harsh, discordant combination of sounds. 

  • An instance of disharmony or disjunction; a clash. 

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

tug of war

noun
  • A dispute between two parties, particularly an entrenched, back-and-forth dispute. 

  • A game or competition in which two teams pull or tug on opposite ends of a rope trying to force the other team over the line which initially marked the middle between the two teams. 

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