unkindly vs unsympathizing

unkindly

adj
  • Not kind, lacking in friendliness, warm-heartedness or sympathy. 

adv
  • In an unkind manner. 

unsympathizing

adj
  • Failing to sympathize; lacking sympathy 

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