Spartan vs dauntless

Spartan

adj
  • Of or relating to Sparta or its citizens. 

noun
  • A citizen of Sparta; a native or inhabitant of Sparta. 

  • A red apple cultivar from British Columbia, Canada 

dauntless

adj
  • Invulnerable to fear or intimidation. 

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