field boot vs loafer

field boot

noun

  • a type of walking boot 

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 field boot and loafer occurred in a corpus of books? (source: Google Ngram Viewer )