prosaic vs unsharp

prosaic

adj
  • Overly plain, simple or commonplace, to the point of being boring. 

  • Straightforward; matter-of-fact; lacking the feeling or elegance of poetry. 

  • Pertaining to or having the characteristics of prose. 

unsharp

adj
  • dulled or intentionally blunt. 

  • out of focus; blurry. 

verb
  • To sharpen (an image) by creating a blurred ("unsharp") negative as a mask, and then combining that mask with the original. 

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