daven vs intone

daven

verb
  • to recite the Jewish liturgy; to pray 

intone

verb
  • To utter with a musical or prolonged note or tone; to speak or recite with singing voice; to chant. 

  • To utter a tone; utter a protracted sound. 

  • To give tone or variety of tone to; to vocalize. 

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