elutriate vs spruce up

elutriate

verb
  • To decant; to purify something by straining it. 

  • To separate large and small particles through an upwardly flowing liquid or vapid stream. 

spruce up

verb
  • To refresh, revamp; to freshen or improve something, especially its appearance. 

  • To dress or arrange smartly, elegantly, and neatly; to smarten. 

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