Do expiations multiply if a person swore not to do something in a specific month and then did it, and then swore not to do the same thing in another month and then did it, knowing that the oath is restricted by time?

If a person swears not to do a specific thing in a certain month and then does it, and then swears the same oath regarding the same act in another month and does it, two expiations are required. This is because the second oath is separate from the first. However, if he violates a single oath more than once, only one expiation is required, unless he intended to repeatedly violate it, or if the wording of the oath implied repetition (e.g., "every time," "whenever").