concert vs concord

concert

noun
  • Agreement in a design or plan; union formed by mutual communication of opinions and views; accordance in a scheme; harmony; simultaneous action. 

  • A musical entertainment in which several voices or instruments take part. 

  • Musical accordance or harmony; concord. 

verb
  • To act in harmony or conjunction; to form combined plans. 

  • To plan; to devise; to arrange. 

  • To plan together; to settle or adjust by conference, agreement, or consultation. 

concord

noun
  • A state of agreement; harmony; union. 

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

  • 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. 

verb
  • To agree; to act together 

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