consistency vs weakness

consistency

noun
  • 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. 

  • Reliability or uniformity; the quality of being consistent. 

  • The degree of viscosity of something. 

  • Local coherence. 

weakness

noun
  • An inadequate quality; fault 

  • The condition of being weak. 

  • A special fondness or desire. 

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