old money vs vieux riche

old money

noun
  • Families that have been wealthy for generations or members of such families. 

  • The monetary system used in the United Kingdom and Ireland before decimalisation in 1971 and consisting of pounds, shillings, pence and farthings. 

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

vieux riche

noun
  • Old money; wealthy persons whose fortunes are inherited, and who are therefore perceived to have refinement and good breeding. 

How often have the words old money and vieux riche occurred in a corpus of books? (source: Google Ngram Viewer )