tonal vs unkeyed

tonal

noun
  • An animal companion which accompanies a person from birth to death. 

adj
  • Employing differences in pitch (tones) to distinguish differences in the meaning of otherwise similar words (words which would otherwise be homophonic). 

  • Of or relating to tones or tonality. 

  • Of or relating to the general character, mood, or trend of something. 

  • Employing tones that have a predictable relationship to some tonic. 

unkeyed

adj
  • Without a key. 

  • Atonal. 

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