levigate vs scritch

levigate

verb
  • To make smooth or polish. 

  • To separate finer grains from coarser ones by suspension in a liquid. 

  • To lighten. 

  • To belittle. 

  • To make into a smooth paste or fine powder. 

adj
  • Smooth. 

  • Made less harsh or burdensome; alleviated. 

scritch

verb
  • To scratch so as to relieve an itch or irritation. 

  • To make a light scratching sound, like a small animal burrowing. 

noun
  • The act of scratching an itch. 

  • A light scratching sound, like a small animal burrowing. 

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