breeches vs chaps

breeches

noun
  • A garment worn by men, covering the hips and thighs; smallclothes. 

  • Trousers; pantaloons. 

chaps

noun
  • Protective leather leggings attached at the waist. 

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