indubitableness vs positivism

indubitableness

noun
  • The quality of being indubitable. 

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). 

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