driftless vs unconscious

driftless

adj
  • Having no drift or direction; without aim; purposeless. 

unconscious

adj
  • Without directed thought or awareness. 

  • Not awake; having no awareness. 

  • engaged in skilled performance without conscious control. 

noun
  • That part of mind that is not consciously perceived. 

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