affair vs responsibility

affair

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

  • 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). 

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

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

  • A material object (vaguely designated). 

responsibility

noun
  • The state of being responsible, accountable, or answerable. 

  • A duty, obligation or liability for which someone is held accountable. 

  • The obligation to carry forward an assigned task to a successful conclusion. With responsibility goes authority to direct and take the necessary action to ensure success. 

  • The obligation for the proper custody, care, and safekeeping of property or funds entrusted to the possession or supervision of an individual. 

  • The state of being liable, culpable, or responsible for something in particular. 

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