Suggestion; Schedule fans voting to time period

[HarryHeights]

I dunno if the title of my suggestion properly explains what I want to suggest though.

It would be great that if I could set for how long I wish to upvote a particular fan and on which days.

For example, I can decide that I want to upvote my friend's post for a period of one month. Within that space, I can also decide that I wish to upvote his/her posts only on some weekdays.

How feasible is this?