concurrence vs consistency

concurrence

noun
  • Agreement; concurring. 

  • An instance of simultaneous occurrence. 

consistency

noun
  • Correspondence or compatibility. 

  • Freedom from contradiction; the state of a system of axioms such that none of the propositions deduced from them are mutually contradictory. 

  • Reliability or uniformity; the quality of being consistent. 

  • The degree of viscosity of something. 

  • Local coherence. 

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