cohesion vs constancy

cohesion

noun
  • State of cohering, or of working together. 

  • Grammatical or lexical relationship between different parts of the same text. 

  • Growing together of normally distinct parts of a plant. 

  • Various intermolecular forces that hold solids and liquids together. 

  • Degree to which functionally related elements in a system belong together. 

constancy

noun
  • The quality of being constant; steadiness or faithfulness in action, affections, purpose, etc. 

  • An unchanging quality or characteristic of a person or thing. 

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