cognizance vs discernment

cognizance

noun
  • Notice or awareness. 

  • An emblem, badge or device, used as a distinguishing mark by the body of retainers of a royal or noble house. 

  • Jurisdiction. 

discernment

noun
  • The condition of understanding. 

  • The act of distinguishing between things. 

  • The ability to distinguish between things. 

  • Aesthetic discrimination; taste, appreciation. 

  • The ability to make wise judgements; sagacity. 

  • Perceptiveness. 

  • Discretion in judging objectively. 

  • The ability to perceive differences that exist. 

  • The ability to distinguish; judgement. 

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