lummox vs slummock

lummox

noun

  • A clumsy, stupid person; an awkward bungler. 

slummock

noun

  • A slovenly person 

verb

  • To behave awkwardly or clumsily 

  • To behave lazily or indolently 

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