racing briefs vs swimming costume

racing briefs

noun
  • A briefs-style male swimsuit typically worn in competitive swimming and diving. 

swimming costume

noun
  • the garments that one wears when bathing in the sea or a swimming pool, especially the one-piece garment worn by women and girls. 

How often have the words racing briefs and swimming costume occurred in a corpus of books? (source: Google Ngram Viewer )