fortitude vs impatience

fortitude

noun
  • Mental or emotional strength that enables courage in the face of adversity. 

impatience

noun
  • The quality of being impatient; lacking patience; restlessness and intolerance of delays; anxiety and eagerness, especially to begin something. 

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