public vs undercover

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. 

undercover

adj
  • Performed or happening in secret. 

  • Employed or engaged in spying or secret investigation. 

verb
  • To provide too little coverage. 

noun
  • A person who works undercover. 

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