fashionability

From fashionable +‎ -ity.

fashionability (usually uncountable, plural fashionabilities)

1. Fashionableness.
   • 1872 January 20, J. R. Robinson, “From the Winona (Minn.) Republican. Huxley and the Spiritualists. That Eminent Scientist Catches an American Tartar in a Winona Defender of the Faith.”, in Religio-Philosophical Journal, volume XI, number 18, Chicago, Ill.: S[teven] S. Jones, page 1, column 5:

     And now, if all the devices made use of on the occasion we have suggested—scowls, contemptuosities, cries of “humbug,” “devil in’t,“ charlatanry, and the hue and cry of editors, D. D.’s, M. D.’s, priests, lawyers, fashionability of churches, etc., put into grand action for reversing the mighty current of the Mrs. Scip., would prove a non sequitur, you can judge of the result of similar action upon the great “humbug,” Spiritualism; […]

   • 2010 November 14, Hadley Freeman, The Guardian:

     It is as uncomfortable for us to wear stilettos as it would be for you. It's just that some women don't see an inability to walk as a problem in the pursuit of (misguided) fashionability.