slobber vs water at the mouth

slobber

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

  • Muddy or marshy land; mire. 

verb
  • To kiss. 

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

water at the mouth

How often have the words slobber and water at the mouth occurred in a corpus of books? (source: Google Ngram Viewer )