palmy vs prosperous

palmy

adj
  • Prosperous, flourishing, booming or thriving. 

  • Of, related to, or abounding in palm trees. 

prosperous

adj
  • Characterized by success. 

  • Well off; affluent. 

  • Favorable. 

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