indifferently vs sparingly

indifferently

adv
  • Tolerably; passably. 

  • Without distinction; impartially, objectively. 

  • Without great care; without sufficient attention or thought. 

sparingly

adv
  • In a sparing manner; with frugality, moderation, scantiness, reserve, forbearance, or the like; sparsely. 

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