in clover vs well off

in clover

prep
  • In a condition of prosperity. 

  • Happy and contented. 

well off

adj
  • Of any item, in a good position or circumstance. 

  • Of a person: in fortunate circumstances, especially having financial security; comfortably off. 

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