a la mode vs démodé

a la mode

adv

  • In a particular style or fashion. 

adj

  • Fashionable; in the current style or fashion. 

  • Served with ice cream. 

  • Of beef: larded and stewed with vegetables. 

démodé

adj

  • Outdated, old-fashioned. 

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