millionaire vs top dog

millionaire

noun
  • A person whose net worth is at or greater than one million units of the local currency, but less than two million. 

  • A person whose net worth is at or greater than one million units of the local currency; a multimillionaire. 

top dog

noun
  • The boss, the leader (of the pack). 

  • In a competition, the one expected to win. 

How often have the words millionaire and top dog occurred in a corpus of books? (source: Google Ngram Viewer )