industrialist vs millionaire

industrialist

noun
  • A person involved in the ownership or management of an industrial enterprise. 

  • One who performs or enjoys industrial music. 

millionaire

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

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

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