feudal vs medieval

feudal

adj
  • Of, or relating to feudalism. 

medieval

adj
  • Archaic. 

  • Of or relating to the Middle Ages, the period from approximately 500 to 1500 AD. 

  • Brutal. 

noun
  • Someone living in the Middle Ages. 

  • A medieval example (of something aforementioned or understood from context). 

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