explicit vs unclear

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. 

unclear

adj
  • Not easy to see or read; indecipherable or unreadable. 

  • Ambiguous; liable to more than one interpretation. 

  • Not having a clear idea; uncertain. 

  • Not clearly or explicitly defined. 

verb
  • To undo the process of clearing. 

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