lick one’s chops vs slobber

lick one’s chops

slobber

verb
  • To kiss. 

  • To allow saliva or liquid to run from one's mouth. 

noun
  • Liquid material, generally saliva, that dribbles or drools outward and downward from the mouth. 

  • Muddy or marshy land; mire. 

How often have the words lick one’s chops and slobber occurred in a corpus of books? (source: Google Ngram Viewer )