hooligan vs roughie

hooligan

noun
  • A person who causes trouble or violence. 

  • A type of fish, an anadromous smelt, Thaleichthys pacificus, found in the North Pacific. 

  • A member of the coast guard. 

roughie

noun
  • A film portraying rough sex. 

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