basilica vs oratory

basilica

noun
  • A Christian church building having a nave with a semicircular apse, side aisles, a narthex and a clerestory. 

  • A Roman Catholic church or cathedral with basilican status, an honorific status granted by the pope to recognize its historical, architectural, or sacramental importance. 

oratory

noun
  • A Catholic church belonging to the Oratory of Saint Philip Neri. 

  • Eloquence; the quality of artistry and persuasiveness in speech or writing. 

  • A Roman Catholic chapel; a building for public or private worship that is not a parish church. 

  • A private chapel or prayer room. 

  • The art of public speaking, especially in a formal, expressive, or forceful manner. 

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