cognizance vs sensitivity

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. 

sensitivity

noun
  • The quality or state of being sensitive; sensitiveness. 

  • The degree of response of an instrument to a change in an input signal. 

  • The degree of response of a film etc. to light of a specified wavelength. 

  • The ability of an organism or organ to respond to external stimuli. 

  • Vulnerability to medical treatment: Synonym of susceptibility. 

  • The probability, in a binary classification test, of a true positive being correctly identified. 

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