audible vs marked

audible

adj
  • Able to be heard. 

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. 

marked

adj
  • Clearly evident; noticeable; conspicuous. 

  • Singled out; suspicious; treated with hostility; the object of vengeance. 

  • Having a secret mark on the back for cheating. 

  • In police livery, as opposed to unmarked. 

  • Distinguished by a positive feature. 

  • Having a visible or identifying mark. 

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