gentleness vs grudge

gentleness

noun
  • The state of being gentle. 

grudge

verb
  • To be unwilling to give or allow (someone something). 

noun
  • Deep-seated and/or long-term animosity or ill will about something or someone, especially due to a past misdeed or mistreatment. 

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