psalm vs versify

psalm

verb
  • To extol in psalms; to make music; to sing 

noun
  • A sacred song; a poetical composition for use in the praise or worship of God. 

  • One of the hymns by David and others, collected into one book of the Old Testament, or a modern metrical version of such a hymn for public worship. 

versify

verb
  • to make or compose verses 

  • to tell in verse; deal with in verse form 

  • to turn (prose) into poetry; rewrite in verse form 

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