fourth estate vs reportage

fourth estate

noun
  • Journalism or journalists considered as a group; the press. 

reportage

noun
  • News or information that has been reported; media coverage of a topic or event. 

  • Information supplied in a report. 

  • The reporting of news, especially by an eyewitness. 

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