consistency vs regularity

consistency

noun
  • Reliability or uniformity; the quality of being consistent. 

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

  • Correspondence or compatibility. 

  • The degree of viscosity of something. 

  • Local coherence. 

regularity

noun
  • The condition or quality of being regular 

  • A particular regular occurrence 

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