ardency vs indifference

ardency

noun
  • Intensity of devotion. 

  • Intensity of light. 

  • Intensity of heat or burning. 

  • Intensity of feelings. 

indifference

noun
  • Unconcerned nonchalance. 

  • The state of being indifferent. 

  • Unbiased impartiality. 

  • Unemotional apathy. 

  • Self-identity defined through the negation of difference, non-difference. 

  • A lack of enthusiasm. 

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