impermanence vs steadfastness

impermanence

noun
  • Lack of permanence or continued duration. 

  • The quality or state of being impermanent. 

  • Anicca, the doctrine which asserts that all of conditioned existence is transient. 

steadfastness

noun
  • Loyalty in the face of trouble and difficulty. 

  • Steadfast resolution. 

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