combination vs concomitance

combination

noun
  • The act of combining, the state of being combined or the result of combining. 

  • One or more elements selected from a set without regard to the order of selection. 

  • An association or alliance of people for some common purpose. 

  • A combination shot; a billiard; a shot where the cue ball hits a ball that strikes another ball on the table. 

  • A sequence of numbers or letters used to open a combination lock. 

  • A rapid sequence of punches or strikes in boxing or other combat sports. 

  • A motorcycle and sidecar. 

  • An object formed by combining. 

concomitance

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

  • A concomitant. 

  • 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. 

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