fad vs fashion

fad

noun
  • A phenomenon that becomes popular for a very short time. 

fashion

noun
  • Popular trends. 

  • The make or form of anything; the style, shape, appearance, or mode of structure; pattern, model; workmanship; execution. 

  • A current (constantly changing) trend, favored for frivolous rather than practical, logical, or intellectual reasons. 

  • A style or manner in which something is done. 

verb
  • To make, build or construct, especially in a crude or improvised way. 

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