iOS Notification Trigger: Every Two Months & Every Three Months - ios

Question

I'm trying to create notifications that repeat every two months or every three months, depending on the user's selection.
I can successfully create one that sends a notification two/three months after the user makes their initial choice, but the 'repeats:' part is stuck on that day, so it will just repeat once a year at whatever two/three months after their initial selection was.
How can I create a notification that repeats every two/three months? Is there a way to repeat the dateRequest() function call each time the notification is triggered? That way, I could continually get a notification every two/three months because the call would be refreshed.
Here's my code to create the 'every two months' notification. The three months code is essentially the same.
var components = DateComponents()
//if it's January - October, send notification two months after the current month
if Date().currentMonth()! < 11 {
components.month = Date().currentMonthPlusTwo()
//if it's November, send notification in January
} else if Date().currentMonth()! == 11 {
components.month = 1
//if it's December, send notification in February
} else if Date().currentMonth()! == 12 {
components.month = 2
}
components.day = Date().dayOfMonth()
components.hour = 14
components.minute = 30 //every two months at 2:30pm
NotificationService.shared.dateRequest(with: components, contactName: storedContacts[key].key, identifier: storedContacts[key].value[10])
Any feedback is appreciated. Thank you.