matter of course vs possibility

matter of course

noun
  • An expected or customary outcome. 

  • A natural or logical outcome. 

possibility

noun
  • The quality of being possible. 

  • An option or choice, usually used in context with future events. 

  • A thing possible; that which may take place or come into being. 

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