semantic vs unvoiced

semantic

adj
  • Petty or trivial; (of a person or statement) quibbling, niggling. 

  • Reflecting intended structure and meaning. 

  • Of or relating to semantics or the meanings of words. 

noun
  • In such writing systems as the Chinese writing system, the portion of a phono-semantic character that provides an indication of its meaning; contrasted with phonetic. 

unvoiced

adj
  • Not spoken or expressed. 

  • Spoken without vibration of the vocal chords. 

  • Of an IRC user: not granted voice privileges. 

  • That does not contain voice. 

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