cream off vs levigate

cream off

verb
  • To extract the cream or creamy part from something. 

  • To separate (the best part of something from the regular part). 

  • To use a cream (cold cream) to remove something (usually makeup, from one's face). 

  • To earn, or embezzle, a percentage of a profit. 

levigate

verb
  • To make into a smooth paste or fine powder. 

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

  • To make smooth or polish. 

  • To lighten. 

  • To belittle. 

adj
  • Smooth. 

  • Made less harsh or burdensome; alleviated. 

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