apparent vs muffled

apparent

adj
  • Capable of being seen, or easily seen; open to view; visible to the eye, eyely; within sight or view. 

  • Appearing to the eye or mind (distinguished from, but not necessarily opposed to, true or real); seeming. 

  • Clear or manifest to the understanding; plain; evident; obvious; known; palpable; indubitable. 

muffled

adj
  • Stifled or covered up; diminished by interference. 

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