desert boot vs loafer

desert boot

noun
  • A type of laced ankle-high boots made of soft suede with a crepe sole 

loafer

noun
  • A shoe with no laces, resembling a moccasin. 

  • An idle person. 

  • A wolf, especially a grey or timber wolf. 

verb
  • To loaf around; to be idle. 

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