slacker vs slummock

slacker

noun
  • A person lacking a sense of direction in life; an underachiever. 

  • A user of the Slackware Linux distribution. 

  • A member of a certain 1990s subculture associated with Generation X. 

  • One who procrastinates or is lazy. 

slummock

noun
  • A slovenly person 

verb
  • To behave awkwardly or clumsily 

  • To behave lazily or indolently 

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