gallantry vs invincibility

gallantry

noun
  • an instance of gallant behaviour or speech 

  • chivalrous courtliness, especially towards women 

  • courage 

invincibility

noun
  • The quality or state of being invincible; invincibleness. 

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