explicit vs hairline

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. 

hairline

noun
  • A very thin line in writing, drawing, or typography. 

  • A fishing line made from hair. 

  • The line along one's forehead where hair starts growing. 

  • A very thin fissure. 

adj
  • very thin, as thin as a hair 

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