Nike doesn't have a set schedule for when their items will be restocked. This is especially true for popular shoe styles like the Nike Air Force 1, which sell out quickly because there aren't many of them. Nike is criticized for having a marketing strategy based on making products seem scarce and offering deals that are only good for a short time to make them seem more valuable.
If you want to improve your chances of getting the shoes you want, you should check their website often. Nike restocks their items as soon as new stock comes in, so the best thing to do is check back often for new items. You could also check with a nearby Nike store to see if they have shoes in your size, or you could call them for help if you can't find the shoes you want.
