fourth estate vs gazetteer

fourth estate

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

gazetteer

noun
  • journalist 

  • A newspaper. 

  • publicist 

  • A geographic dictionary or encyclopedia, sometimes found as an index to an atlas. 

verb
  • To describe in a gazetteer. 

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