plug-ugly vs squalid

plug-ugly

adj
  • Very ugly. 

noun
  • An ugly person. 

  • A member of an American nativist street gang that operated in the west side of Baltimore, Maryland, from 1854 to 1865. 

squalid

adj
  • Extremely dirty and unpleasant. 

  • Showing a contemptible lack of moral standards. 

noun
  • Any member of the family Squalidae of dogfish sharks. 

How often have the words plug-ugly and squalid occurred in a corpus of books? (source: Google Ngram Viewer )