fact vs notion

fact

noun
  • Something actual as opposed to invented. 

  • An individual value or measurement at the lowest level of granularity in a data warehouse. 

  • An objective consensus on a fundamental reality that has been agreed upon by a substantial number of experts. 

  • Something which is real. 

  • A wrongful or criminal deed. 

  • Something concrete used as a basis for further interpretation. 

  • Information about a particular subject, especially actual conditions and/or circumstances. 

intj
  • Used before making a statement to introduce it as a trustworthy one. 

notion

noun
  • An invention; an ingenious device; a knickknack. 

  • Mental apprehension of whatever may be known, thought, or imagined; idea, concept. 

  • A sentiment; an opinion. 

  • Any small article used in sewing and haberdashery, either for attachment to garments or as a tool, such as a button, zipper, or thimble. 

  • Inclination; intention; disposition. 

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