hassle vs tug of war

hassle

noun
  • A fight or argument. 

  • Trouble, bother, unwanted annoyances or problems. 

  • An action which is not worth the difficulty involved. 

verb
  • To engage in a mock dogfight. 

  • To pick a fight or start an argument with. 

  • To trouble, to bother, to annoy. 

adj
  • hassling; hasslesome 

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