muckrake vs tittle-tattle

muckrake

verb
  • To search for and expose corruption or scandal, especially as a form of investigative journalism. 

noun
  • A rake for scraping up dung. 

tittle-tattle

verb
  • To engage in such gossip. 

  • To spread gossip. 

noun
  • An idle, trifling talker; a gossip. 

  • petty, idle gossip. 

How often have the words muckrake and tittle-tattle occurred in a corpus of books? (source: Google Ngram Viewer )