positivism vs positivity

positivism

noun
  • A doctrine that states that the only authentic knowledge is scientific knowledge, and that such knowledge can only come from positive affirmation of theories through strict scientific method, refusing every form of metaphysics. 

  • A school of thought in jurisprudence in which the law is seen as separated from moral values; i.e. the law is posited by lawmakers (humans). 

positivity

noun
  • The result of being positive. 

  • The condition of being positive (in all senses); positivism. Optimism. 

  • The characteristic of possessing a positive electric charge 

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