sluggish vs unsharp

sluggish

adj
  • Characteristic of a sluggard; dull; stupid; tame; simple. 

  • Habitually idle and lazy; slothful; dull; inactive 

  • Having no power to move oneself or itself; inert. 

  • Exhibiting economic decline, inactivity, slow or subnormal growth. 

  • Slow; having little motion. 

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 sluggish and unsharp occurred in a corpus of books? (source: Google Ngram Viewer )