Black Monk vs oblate

Black Monk

noun
  • A Benedictine monk, one of the Order of Saint Benedict. 

oblate

noun
  • A person dedicated to a life of religion or monasticism, especially a member of an order without religious vows or a lay member of a religious community. 

  • A child given up by its parents into the keeping or dedication of a religious order or house. 

verb
  • To offer as either a gift or an oblation. 

adj
  • Flattened or depressed at the poles. 

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