coot vs slummock

coot

noun
  • A foolish or eccentric fellow 

  • Body louse (Pediculus humanus). 

  • A success; something excellent. 

  • Any of various aquatic birds of the genus Fulica that are mainly black with a prominent frontal shield on the forehead. 

slummock

noun
  • A slovenly person 

verb
  • To behave awkwardly or clumsily 

  • To behave lazily or indolently 

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