glib vs plausible

glib

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

  • Snarky or unserious in a disrespectful way. 

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

verb
  • To make smooth or slippery. 

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

plausible

adj
  • Obtaining approbation; specifically pleasing; apparently right; specious. 

  • Seemingly or apparently valid, likely, or acceptable; conceivably true or likely. 

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