perseverance vs stamina

perseverance

noun
  • Continuing in a course of action without regard to discouragement, opposition or previous failure. 

stamina

noun
  • The energy and strength for continuing to do something over a long period of time; power of sustained exertion, or resistance to hardship, illness etc. 

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