indifference vs neutrality

indifference

noun
  • Unbiased impartiality. 

  • Unconcerned nonchalance. 

  • The state of being indifferent. 

  • Unemotional apathy. 

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

  • A lack of enthusiasm. 

neutrality

noun
  • The state or quality of being neutral; the condition of being unengaged in contests between others; state of taking no part on either side. 

  • The quality or state of being neutral. 

  • The condition of a nation or government which refrains from taking part, directly or indirectly, in a war between other powers. 

  • Those who are neutral; a combination of neutral powers or states. 

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