neo-rich vs new money

neo-rich

noun
  • Synonym of nouveau riche 

new money

noun
  • Persons or families that have recently become wealthy. 

  • The decimal monetary system used in the United Kingdom since 1971. 

  • The metric system of measurement, as opposed to the imperial system. 

How often have the words neo-rich and new money occurred in a corpus of books? (source: Google Ngram Viewer )