titleless vs unvoiced

titleless

adj
  • Having no title; nameless. 

  • Without noble title; common. 

unvoiced

adj
  • That does not contain voice. 

  • Spoken without vibration of the vocal chords. 

  • Of an IRC user: not granted voice privileges. 

  • Not spoken or expressed. 

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