coherence vs consistency

coherence

noun
  • The quality of cohering, or being coherent; internal consistency. 

  • The property of having the same wavelength and phase. 

  • A logical arrangement of parts, as in writing. 

  • A semantic relationship between different parts of the same text. 

  • The quality of forming a unified whole. 

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. 

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