canticle vs doxology

canticle

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

doxology

noun
  • An expression of praise to God, especially a short hymn sung as part of a Christian worship service. 

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