burble vs vox

burble

noun
  • A gush of rapid speech. 

  • The turbulent boundary layer about a moving streamlined body. 

  • A bubbling, gurgling sound, as of a creek. 

  • Trouble; disorder. 

verb
  • To babble; to speak in an excited rush. 

  • To trouble or confuse. 

  • To bubble; to gurgle. 

vox

noun
  • The voice, especially one's singing voice; vocals. 

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