narrator vs printer's reader

narrator

noun
  • One who narrates or tells stories. 

  • The person or the "voice" whose viewpoint is used in telling a story. 

  • The person providing the voice-over in a documentary. 

printer's reader

noun
  • Synonym of proofreader 

How often have the words narrator and printer's reader occurred in a corpus of books? (source: Google Ngram Viewer )