Observant vs secular

Observant

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

secular

noun
  • A secular ecclesiastic, or one not bound by monastic rules. 

  • A layman, as distinguished from a clergyman. 

  • A church official whose functions are confined to the vocal department of the choir. 

adj
  • Not bound by the vows of a monastic order. 

  • Centuries-old, ancient. 

  • Unperturbed over time. 

  • Relating to long-term non-periodic irregularities, especially in planetary motion or magnetic field. 

  • Not specifically religious; lay or civil, as opposed to clerical. 

  • Temporal; worldly, or otherwise not based on something timeless. 

  • Continuing over a long period of time, long-term. 

  • Happening once in an age or century. 

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