pronounce vs vocalize

pronounce

verb
  • To sound out (a word or phrase); to articulate. 

  • To pronounce dead. 

  • To declare formally, officially or ceremoniously. 

  • To pass judgment. 

  • To sound like. 

  • To produce the components of speech. 

  • To declare authoritatively, or as a formal expert opinion. 

  • To read aloud. 

vocalize

verb
  • To express with the voice, to utter. 

  • To sing without using words. 

  • To produce noises or calls from the throat. 

  • To add vowel points to a consonantal script (e.g. niqqud in Hebrew) 

  • To turn a consonant into a vowel. 

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