enmity vs ill will

enmity

noun
  • A state or feeling of opposition, hostility, hatred or animosity. 

  • The quality of being an enemy; hostile or unfriendly disposition. 

ill will

noun
  • A spiteful or vengeful attitude; a grudge; dislike. 

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