tug of war vs wrangling

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. 

wrangling

noun
  • a dispute; a contentious argument; a brawl 

  • dispute; disputation; quarreling 

  • contention; gainstriving 

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