concomitance vs consonance

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. 

consonance

noun
  • Harmony; agreement; lack of discordance. 

  • The repetition of consonant sounds, but not vowels as in assonance. 

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