aloud vs vocally

aloud

adv
  • With a loud voice, or great noise; loudly; audibly. 

  • Audibly, as opposed to silently/quietly. 

adj
  • Spoken out loud. 

vocally

adv
  • In a vocal manner. 

  • Using words. 

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