fat cat vs nouveau riche

fat cat

noun
  • Any affluent person who is perceived to have profited from the labour of others. 

  • A rich person who contributes to a political campaign. 

  • Used other than figuratively or idiomatically: see fat, cat. 

nouveau riche

noun
  • New money; wealthy persons whose fortunes are newly acquired, and who are therefore perceived to lack the refinement of those who were raised wealthy. 

adj
  • Newly rich; like a nouveau riche. 

How often have the words fat cat and nouveau riche occurred in a corpus of books? (source: Google Ngram Viewer )