intone vs phonate

intone

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

  • 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. 

phonate

verb
  • To use the voice to make (specific sounds). 

  • To make sounds with the voice. 

adj
  • voiced 

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