butt-huggers vs sluggos

butt-huggers

noun
  • Men's briefs; underwear. 

  • Skin-tight shorts. 

sluggos

noun
  • A type of men's swimming briefs where the bulge of the genitals is noticeable. 

How often have the words butt-huggers and sluggos occurred in a corpus of books? (source: Google Ngram Viewer )