disinterest vs dispassion

disinterest

noun
  • An absence of interest (attention or curiosity). 

  • The absence of interest (bias or stake). 

verb
  • To render disinterested. 

dispassion

noun
  • Freedom from passion; the absence of passion; an undisturbed state; apathy. 

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