animus vs inflexibleness

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. 

inflexibleness

noun
  • Obstinacy of will or temper; firmness of purpose that will not yield to importunity or persuasion; unbending pertinacity. 

  • The quality or state of being inflexible 

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