concert vs unity

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. 

unity

noun
  • Agreement; harmony. 

  • Any of the three classical rules of drama: unity of action (nothing should be admitted not directly relevant to the development of the plot), unity of place (the scenes should be set in the same place), and unity of time (all the events should be such as might happen within a single day). 

  • The peculiar characteristics of an estate held by several in joint tenancy. 

  • The form of consensus in a Quaker meeting for business which signals that a decision has been reached. In order to achieve unity, everyone who does not agree with the decision must explicitly stand aside, possibly being recorded in the minutes as doing so. 

  • A single undivided thing, seen as complete in itself. 

  • Oneness; the state or fact of being one undivided entity. 

  • The number 1 or any element of a set or field that behaves under a given operation as the number 1 behaves under multiplication. 

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