Spiritual vs ministerial

Spiritual

noun
  • A member of a branch of the Franciscan order that advocated simple dress and renounced the owning of property. 

ministerial

noun
  • A member of the mediaeval estate or caste of unfree nobles. 

adj
  • Related to a governmental minister or ministry. 

  • Related to a religious minister or ministry. 

  • Having the power to wield delegated executive authority. 

  • Serving as an instrument or means (i.e., procedural or ancillary, not substantive). 

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