concomitance vs partnership

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. 

partnership

noun
  • The state of being associated with a partner. 

  • An association of two or more people to conduct a business 

  • The period when two specific batsmen are batting, from the fall of one wicket until the fall of the next; the number of runs scored during this period, 

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