Observant vs consistent

Observant

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

consistent

noun
  • A kind of penitent who was allowed to assist at prayers, but was not permitted to receive the holy sacraments. 

  • Objects or facts that are coexistent, or in agreement with one another. 

adj
  • Of a regularly occurring, dependable nature. 

  • Of a set of statements: such that no contradiction logically follows from them. 

  • Compatible, accordant. 

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