Spartan vs discreet

Spartan

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

  • A red apple cultivar from British Columbia, Canada 

adj
  • Of or relating to Sparta or its citizens. 

discreet

adj
  • Respectful of privacy or secrecy; exercising caution in order to avoid causing embarrassment; quiet; diplomatic. 

  • Not drawing attention, anger or challenge; inconspicuous. 

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