aphonic vs audible

aphonic

adj
  • Of, relating to, or exhibiting aphonia; unable to speak. 

noun
  • A person who has aphonia. 

audible

verb
  • To change the play at the line of scrimmage by yelling out a new one. 

noun
  • The act of or an instance of changing the play at the line of scrimmage by yelling out a new one. 

adj
  • Able to be heard. 

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