On the checkout page, the shopper can enable the Scheduled Order option to create a scheduled order from his cart contents instead of placing the order immediately. When the shopper enables this option, he is presented with a scheduled order form that allows him to specify a name for the scheduled order, define the start and end dates, and set the frequency. Out of the box, frequencies include:
Once a day
Weekly. When this option is selected, the shopper can specify the day of the week (Sunday through Saturday) or the weeks of the month (First, second, third, fourth, last) for when an order should be run.
Monthly. When this option is selected, the shopper can select once a month, every two months, or quarterly for when the order should be run.
The shopper also has the option to suspend the order. Suspended orders are not run until they are re-activated. See Suspend a scheduled order for details.