matins vs morning prayer

matins

noun
  • Together with lauds, the earliest of the canonical hours; traditionally prayed at sunrise or earlier. 

  • Morning prayers. 

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 matins and morning prayer occurred in a corpus of books? (source: Google Ngram Viewer )