bloomers vs trousers

bloomers

noun
  • Women’s underpants with short legs; knickers or drawers. 

trousers

noun
  • An article of clothing that covers the part of the body between the waist and the ankles or knees, and is divided into a separate part for each leg. 

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