known vs public

known

adj
  • Accepted, familiar, researched. 

  • Identified as a specific type; famous, renowned. 

noun
  • Any fact or situation which is known or familiar. 

  • A constant or variable the value of which is already determined. 

public

adj
  • Able to be seen or known by everyone; open to general view, happening without concealment. 

  • Officially representing the community; carried out or funded by the state on behalf of the community. 

  • Traded publicly via a stock market. 

  • Open to all members of a community; especially, provided by national or local authorities and supported by money from taxes. 

  • Pertaining to the people as a whole (as opposed to a private group); concerning the whole country, community etc. 

  • Accessible to the program in general, not only to the class or any subclasses. 

noun
  • The people in general, regardless of membership of any particular group. 

  • A particular group or demographic to be targeted. 

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