polish vs unsharp

polish

verb
  • To shine; to make a surface very smooth or shiny by rubbing, cleaning, or grinding. 

  • To refine; to wear off the rudeness, coarseness, or rusticity of; to make elegant and polite. 

  • To apply shoe polish to shoes. 

  • To become smooth, as from friction; to receive a gloss; to take a smooth and glossy surface. 

  • To refine; remove imperfections from. 

noun
  • Refinement; cleanliness in performance or presentation. 

  • Cleanliness; smoothness, shininess. 

  • A substance used to polish. 

unsharp

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

adj
  • out of focus; blurry. 

  • dulled or intentionally blunt. 

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