canticle vs hymnody

canticle

noun
  • A chant, hymn or song, especially a nonmetrical one, with words from a biblical text. 

hymnody

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

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

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