Spiritual vs boor

Spiritual

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

boor

noun
  • A Boer, white South African of Dutch or Huguenot descent. 

  • An uncultured person. 

  • A yokel, country bumpkin. 

  • A peasant. 

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