indifferently vs unfeelingly

indifferently

adv
  • Without great care; without sufficient attention or thought. 

  • Without distinction; impartially, objectively. 

  • Tolerably; passably. 

unfeelingly

adv
  • In an unfeeling manner; without concern or regard for feelings. 

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