explicit vs muffled

explicit

noun
  • The final few words of a text. 

adj
  • Very specific, clear, or detailed. 

  • Containing material (e.g. language or film footage) that might be deemed offensive or graphic. 

muffled

adj
  • Stifled or covered up; diminished by interference. 

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