plug-ugly vs ribald

plug-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. 

adj
  • Very ugly. 

ribald

noun
  • An individual who is filthy or vulgar in nature. 

adj
  • Coarsely, vulgarly, or lewdly amusing; referring to sexual matters in a rude or irreverent way. 

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