miserere vs psalter

miserere

noun
  • An expression of lamentation or complaint. 

  • A small projecting boss or bracket on the underside of the hinged seat of a church stall, intended to give some support to a standing worshipper when the seat is turned up; a misericord. 

  • Ileus. 

  • A medieval dagger, used for the mercy stroke to a wounded foe; misericord. 

psalter

noun
  • Synonym of breviary, which arranges the Psalms for devotional recitation. 

  • Synonym of Book of Common Prayer, which prominently includes the Psalms. 

  • Synonym of Psalms, particularly when printed as a separate work from the Bible. 

  • A rosary with 150 beads, used for reciting the Psalms in Catholic editions of the Bible. 

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