steadfastness vs volatility

steadfastness

noun
  • Loyalty in the face of trouble and difficulty. 

  • Steadfast resolution. 

volatility

noun
  • The state of having a low boiling point and evaporating readily. 

  • The state of being unpredictable. 

  • The state of being able to fly. 

  • The state of not retaining data in the absence of power. 

  • A quantification of the degree of uncertainty about the future price of a commodity, share, or other financial product. 

  • The state of being volatile. 

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