endurance vs stoicism

endurance

noun
  • Ability to endure hardship. 

  • The length of time that a ship's rations will supply 

  • The measure of a person's stamina or persistence. 

stoicism

noun
  • A real or pretended indifference to pleasure or pain; insensibility; impassiveness. 

  • A school of philosophy popularized during the Roman Empire that emphasized reason as a means of understanding the natural state of things, or logos, and as a means of freeing oneself from emotional distress. 

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