animus vs ill will

animus

noun
  • A feeling of enmity, animosity or ill will. 

  • The masculine aspect of the feminine psyche or personality. 

  • The basic impulses and instincts which govern one's actions. 

ill will

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

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