athletics vs palaestra

athletics

noun
  • A group of sporting activities including track and field, road running, cross country and racewalking. 

  • Physical activities such as sports and games requiring stamina, fitness and skill. 

palaestra

noun
  • A public area in ancient Greece and Rome dedicated to the teaching and practice of wrestling and other sports; a wrestling school, a gymnasium. 

  • An arena for literal or figurative combat; a battlefield. 

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