affair vs fact

affair

noun
  • A material object (vaguely designated). 

  • An action or engagement not of sufficient magnitude to be called a battle. 

  • An adulterous relationship (from affaire de cœur, affair of the heart). 

  • A person with whom someone has an adulterous relationship. 

  • A romantic relationship with someone who is not one's regular partner (boyfriend, girlfriend). 

  • Something which is done or is to be done; business of any kind, commercial, professional, or public. 

  • A party or social gathering, especially of a formal nature. 

  • Any proceeding or action which it is wished to refer to or characterize vaguely. 

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. 

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