Midas vs billionaire

Midas

name
  • A king who sought and was for a while granted the cherished but subtly dangerous magical power to turn anything he touched into gold. 

noun
  • A very large champagne bottle (named after the King) with the capacity of about 30 liters, equivalent to 40 standard bottles. 

billionaire

noun
  • Somebody whose wealth is greater than one billion (10⁹) dollars, or other currency. 

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