pencil-thin vs silky

pencil-thin

adj
  • Somewhat cylindrical and slender like a pencil; also, tall and thin. 

silky

adj
  • Covered in long, slender, glistening hairs pressed close to the surface; sericeous. 

  • Similar in appearance or texture (especially in softness and smoothness) to silk. 

  • Smooth and pleasant; seductive. 

How often have the words pencil-thin and silky occurred in a corpus of books? (source: Google Ngram Viewer )