convention vs fashion

convention

noun
  • A practice or procedure widely observed in a group, especially to facilitate social interaction; a custom. 

  • A formal agreement, contract, rule, or pact. 

  • A treaty or supplement to such. 

  • A meeting or gathering. 

  • The convening of a formal meeting. 

  • A formal deliberative assembly of mandated delegates. 

fashion

noun
  • A style or manner in which something is done. 

  • 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. 

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

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