disinterestedly vs indifferently

disinterestedly

adv
  • In a disinterested manner; impartially, dispassionately. 

indifferently

adv
  • Without distinction; impartially, objectively. 

  • Tolerably; passably. 

  • Without great care; without sufficient attention or thought. 

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