boredom vs indifference

boredom

noun
  • The state of being bored. 

  • An instance or period of being bored; A bored state. 

indifference

noun
  • A lack of enthusiasm. 

  • Unconcerned nonchalance. 

  • The state of being indifferent. 

  • Unbiased impartiality. 

  • Unemotional apathy. 

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

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