a la mode vs on trend

a la mode

adj
  • Fashionable; in the current style or fashion. 

  • Served with ice cream. 

  • Of beef: larded and stewed with vegetables. 

adv
  • In a particular style or fashion. 

on trend

adj
  • Having characteristics which conform to current fashion trends. 

How often have the words a la mode and on trend occurred in a corpus of books? (source: Google Ngram Viewer )