prophesy vs psalmody

prophesy

verb
  • To speak out on the Bible as an expression of holy inspiration; to preach. 

  • To foreshow; to herald; to prefigure. 

  • To predict, to foretell (with or without divine inspiration). 

  • To speak or write with divine inspiration; to act as prophet. 

psalmody

verb
  • To celebrate in psalms. 

noun
  • A collection of psalms. 

  • The singing or the writing of psalms. 

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