concert vs lead sheet

concert

noun
  • Musical accordance or harmony; concord. 

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

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

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. 

lead sheet

noun
  • A form of written music that specifies the melody, lyrics, and harmony. 

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