Refresh my Flows: "Every X days"

I love to have one personal list to listen to for a week. After hearing a song a few times it can really grow on me and make me decide to follow the artist.

I would really love to have my Flow generate a playlist aand keep it the same for a week.

Of course this is different for every listener, so I am thinking about a ‘Refresh my Flows every <configurable number> days’.