kind vs relentless

kind

adj
  • Gentle; tractable; easily governed. 

  • Having a benevolent, courteous, friendly, generous, gentle, liberal, sympathetic, or warm-hearted nature or disposition, marked by consideration for – and service to – others. 

  • Favorable. 

  • Mild, gentle, forgiving 

  • Affectionate. 

noun
  • A makeshift or otherwise atypical specimen. 

  • Equivalent means used as response to an action. 

  • A type, race or category; a group of entities that have common characteristics such that they may be grouped together. 

  • Goods or services used as payment, as e.g. in barter. 

  • Each of the two elements of the communion service, bread and wine. 

relentless

adj
  • Unremitting, steady and persistent. 

  • Unrelenting or unyielding in severity. 

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