canticle vs hymnal

canticle

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

hymnal

noun
  • A collection of hymns; a hymn book. 

adj
  • Of or pertaining to hymns. 

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