homily vs oration

homily

noun
  • A sermon, especially concerning a practical matter. 

  • A platitude. 

  • A moralizing lecture. 

adv
  • In a homey manner. 

oration

noun
  • A formal, often ceremonial speech. 

  • A specific form of short, solemn prayer said by the president of the liturgical celebration on behalf of the people. 

  • A lengthy speech or argument in a private setting. 

verb
  • To deliver an oration; to speak. 

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