disinterest vs dullness

disinterest

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

  • The absence of interest (bias or stake). 

verb
  • To render disinterested. 

dullness

noun
  • Lack of interest or excitement. 

  • The quality of not perceiving or kenning things distinctly. 

  • The quality of being uninteresting; boring; humorless or irksome. 

  • The quality of being slow of understanding things; stupidity. 

  • The lack of visual brilliance; want of sheen. 

  • bluntness. 

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