sleek vs unslippery

sleek

noun
  • That which makes smooth; varnish. 

verb
  • To make smooth or glossy; to polish or cause to be attractive. 

adj
  • Having an even, smooth surface; smooth 

  • Not rough or harsh. 

  • Glossy. 

  • Slim and streamlined; not plump, thick, or stocky. 

  • Healthy, well-fed and well-groomed; in good condition. 

unslippery

adj
  • Not slippery. 

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