bathing suit vs swim briefs

bathing suit

noun
  • A tight-fitting garment worn for swimming, especially the one piece garment worn by women and girls; a swimsuit. 

swim briefs

noun
  • A briefs-style male swimsuit such as those worn in competitive swimming, diving, and water polo. 

How often have the words bathing suit and swim briefs occurred in a corpus of books? (source: Google Ngram Viewer )