fray vs tug of war

fray

noun
  • Conflict, disagreement. 

  • A heated argument; a war of words. 

  • A noisy commotion, especially resulting from fighting; a brawl, a fight; also, a loud quarrel. 

  • A consequence of rubbing, unravelling, or wearing away; a fraying; also, a place where fraying has occurred. 

verb
  • To force or make (a path, way, etc.) through. 

  • To rub. 

  • Often followed by away, off, or out: to frighten or scare (someone or something) away. 

  • Of a person's mental strength, nerves, temper, etc.: to become exhausted or worn out. 

  • To assail or attack (someone or something); to drive (someone or something) away by attacking. 

  • To become unravelled or worn; to unravel. 

  • To be afraid or frightened; to fear. 

  • Of a deer: to rub (its antlers or head) against a tree, etc., to remove the velvet from antlers or to mark territory; also, to rub its antlers against (a tree, etc.) for that purpose. 

  • Of a deer: to rub its antlers against a tree, etc., to remove the velvet or to mark territory. 

  • To alarm or frighten (someone or something). 

  • To chase (someone or something) away; to disperse. 

  • To rub or wear away (something); to cause (something made of strands twisted or woven together, such as cloth or rope) to unravel through friction; also, to irritate (something) through chafing or rubbing; to chafe. 

  • To make an assault or attack; also, to create a disturbance; to brawl, to fight. 

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 fray and tug of war occurred in a corpus of books? (source: Google Ngram Viewer )