ballad vs daven

ballad

verb
  • To compose or sing ballads. 

noun
  • A slow romantic song. 

  • A kind of narrative poem, adapted for recitation or singing; especially, a sentimental or romantic poem in short stanzas. 

daven

verb
  • to recite the Jewish liturgy; to pray 

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