concert vs congruity

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. 

congruity

noun
  • The quality of agreeing; the quality of being suitable and appropriate. 

  • An instance or point of agreement or correspondence; a resemblance. 

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