bathing trunks vs trunks

bathing trunks

noun

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

trunks

noun

  • Shorts or briefs used especially for sports. 

  • Trunkhose. 

  • The game of nineholes. 

  • Trunk briefs. 

  • Swimming trunks. 

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