confidence vs malignity

confidence

noun
  • A feeling of certainty; firm trust or belief; faith. 

  • Information held in secret; a piece of information shared but to thence be kept in secret. 

  • Self-assurance. 

malignity

noun
  • The quality of being malign or malignant; badness, evilness, monstrosity, depravity, maliciousness. 

  • A non-benign cancer; a malignancy. 

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