hymnal vs hymnody

hymnal

noun
  • A collection of hymns; a hymn book. 

adj
  • Of or pertaining to hymns. 

hymnody

noun
  • The hymns of a particular church or of a particular time. 

  • The writing, composing, or singing of hymns or psalms. 

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