dawn vs morning prayer

dawn

noun
  • The morning twilight period immediately before sunrise. 

  • The rising of the sun. 

  • The earliest phase of something. 

  • The time when the sun rises. 

verb
  • To begin to give promise; to begin to appear or to expand. 

  • To begin to brighten with daylight. 

  • To start to appear or be realized. 

morning prayer

noun
  • The first of the two services of the Anglican Daily Office, combining the canonical hours of matins, lauds and prime. 

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