equality vs variance

equality

noun
  • The equal treatment of people irrespective of social or cultural differences. 

  • The fact of being equal, of having the same value. 

  • The fact of being equal. 

variance

noun
  • The state of differing or being in conflict. 

  • A discrepancy between two legal documents. 

  • A departure from a cause of action originally in a complaint. 

  • An official permit to do something that is ordinarily forbidden by regulations. 

  • The act of varying or the state of being variable. 

  • The number of degrees of freedom in a system. 

  • Covariance and contravariance generally. 

  • A difference between what is expected and what is observed; deviation. 

  • The second central moment in probability. 

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