laggard vs slummock

laggard

noun
  • One who lags behind; one who takes more time than is necessary or than the others in a group. 

adj
  • Lagging behind; taking more time than the others in a group. 

  • Not growing as quickly as the rest of the flock or herd. 

slummock

noun
  • A slovenly person 

verb
  • To behave awkwardly or clumsily 

  • To behave lazily or indolently 

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