king of the castle vs muckety muck

king of the castle

noun
  • An individual who assumes a position of greater importance, authority, or prominence than others. 

  • A children's game in which one player is located on something elevated and other players attempt to take his or her place. 

muckety muck

noun
  • A high muckamuck; a person (especially self-important) in a position of power, authority, or status. 

How often have the words king of the castle and muckety muck occurred in a corpus of books? (source: Google Ngram Viewer )