The length of time does it consider a red wine slushy to freeze?

Assuming you indicate in a standard kitchen area freezer:

It will take around 2 hours for your white wine slushy to freeze strong. However, if you want it to be the perfect consistency, we recommend checking it every 45 minutes or so to offer it a stir.  https://heathergreenphoto.com/?p=377 This will help to prevent large ice crystals from forming and ruining the smooth, slushy texture. try this site