concomitance vs difference

concomitance

noun
  • A concomitant. 

  • occurrence or existence together or in connection with one another, coexistence 

  • The Roman Catholic doctrine of the existence of the entire body of Christ in the Eucharist, under each element, so that the body and blood are both received by communication in one kind only. 

difference

noun
  • The result of a subtraction; sometimes the absolute value of this result. 

  • A disagreement or argument. 

  • An addition to a coat of arms to distinguish two people's bearings which would otherwise be the same. See augmentation and cadency. 

  • A characteristic of something that makes it different from something else. 

  • The quality of being different. 

  • The quality or attribute which is added to those of the genus to constitute a species; a differentia. 

  • The set of elements that are in one set but not another ( scriptstyle A◌̅B). 

  • Significant change in or effect on a situation or state. 

  • A Boolean operation which is true when the two input variables are different but is otherwise false; the XOR operation ( scriptstyle A◌̅B+◌̅AB). 

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