concord vs quarrel

concord

verb
  • To agree; to act together 

noun
  • Agreement of words with one another, in gender, number, person or case. 

  • A state of agreement; harmony; union. 

  • An agreeable combination of tones simultaneously heard; a consonant chord; consonance; harmony. 

  • A variety of sweet American grape, with large dark blue (almost black) grapes in compact clusters; a Concord grape. 

quarrel

verb
  • To find fault; to cavil. 

  • To argue fiercely; to contend; to squabble; to cease to be on friendly terms, to fall out. 

  • To argue or squabble with (someone). 

noun
  • A dispute or heated argument (especially one that is verbal). 

  • Often preceded by a form of to have: a basis or ground of dispute or objection; a complaint; also, a feeling or situation of ill will and unhappiness caused by this. 

  • A propensity to quarrel; quarrelsomeness. 

  • An arrow or bolt for a crossbow or an arbalest (“a late, large type of crossbow”), traditionally with the head square in its cross section. 

  • A diamond- or square-shaped piece of glass forming part of a lattice window. 

  • A square tile; a quarry tile; (uncountable) such tiles collectively. 

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