disinterest vs self-confidence

disinterest

verb

  • To render disinterested. 

noun

  • The absence of interest (bias or stake). 

  • An absence of interest (attention or curiosity). 

self-confidence

noun

  • A measure of one's belief in one's own abilities 

  • The state of being self-confident 

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