fourth estate vs journalism

fourth estate

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

journalism

noun
  • The activity or profession of being a journalist. 

  • The aggregating, writing, editing, and presenting of news or news articles for widespread distribution, typically in electronic publications and broadcast news media, for the purpose of informing the audience. 

  • The style of writing characteristic of material in periodical print publications and broadcast news media, consisting of direct presentation of facts or events with an attempt to minimize analysis or interpretation. 

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