cognizance vs darkness

cognizance

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

  • Notice or awareness. 

  • Jurisdiction. 

darkness

noun
  • Lack of knowledge; obscurity or meaning or intelligibility; the unknown. 

  • Secrecy; concealment. 

  • The product of being dark. 

  • Gloom; gloominess; depression. 

  • The state of being dark; lack of light; the absolute or comparative absence of light. 

  • Hell. 

  • The state or quality of reflecting little light, of tending to a blackish or brownish color. 

  • Lack of understanding or compassion; spiritual or mental blindness. 

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