loafer vs sports shoe

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. 

sports shoe

noun
  • protective covering for the foot primarily designed for sports or other forms of physical exercise 

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