oration vs vox populi

oration

noun
  • A lengthy speech or argument in a private setting. 

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

  • A formal, often ceremonial speech. 

verb
  • To deliver an oration; to speak. 

vox populi

noun
  • The public comment portion of a public meeting. 

  • voice of the people. 

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