rotter vs slummock

rotter

noun

  • A despicable, worthless person. 

  • A scoundrel. 

slummock

noun

  • A slovenly person 

verb

  • To behave awkwardly or clumsily 

  • To behave lazily or indolently 

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