bathing suit vs bathing trunks

bathing suit

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

bathing trunks

noun
  • A pair of shorts or briefs worn for swimming or bathing. 

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