Observant vs obedient

Observant

noun
  • A member of a Franciscan order that strictly observes the rules of St. Francis. 

obedient

noun
  • One who obeys. 

adj
  • Willing to comply with the commands, orders, or instructions of those in authority. 

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