detached vs impartial

detached

adj
  • Not influenced by anyone else; characterized by an impersonal objectivity; impartial. 

  • Having or showing no bias or emotional involvement; disinterested. 

  • Not physically attached; separated from something it could connect to. 

  • Of a house: not joined to another house on either side. 

impartial

adj
  • treating all parties, rivals, or disputants equally; not partial; not biased 

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