What happens when a frequency rule is set and 2 emails are queued for the user?

When a default frequency rule is set to say 1 week, and 2 emails were scheduled to him in that week. What would happen. Would that email be rescheduled to the next available opportunity? Or would it be discarded?

When a default frequency rule is set to say 1 week, and 2 emails were scheduled to him in that week. What would happen. Would that email be rescheduled to the next available opportunity? Or would it be discarded?

Any answers on this?