concert vs negotiate

concert

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

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

  • To plan; to devise; to arrange. 

noun
  • 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. 

  • Musical accordance or harmony; concord. 

negotiate

verb
  • To arrange or settle something by mutual agreement. 

  • To succeed in coping with, or getting over something. 

  • To transfer to another person with all the rights of the original holder; to pass, as a bill. 

  • To confer with others in order to come to terms or reach an agreement. 

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