cognizance vs senselessness

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. 

senselessness

noun
  • The state of being senseless; unsense. 

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