glib vs unsharp

glib

adj
  • Snarky or unserious in a disrespectful way. 

  • Having a ready flow of words but lacking thought or understanding; superficial; shallow. 

  • Artfully persuasive but insincere in nature; smooth-talking, honey-tongued, silver-tongued. 

verb
  • To make smooth or slippery. 

noun
  • A mass of matted hair worn down over the eyes, formerly used in Ireland. 

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