swimming shorts vs trunks

swimming shorts

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

trunks

noun
  • Swimming trunks. 

  • Trunkhose. 

  • The game of nineholes. 

  • Trunk briefs. 

  • Shorts or briefs used especially for sports. 

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