Reminders can occur one time or can be repeated.

When you create a reminder, you'll see a "Repeat every..." option which offers a number of different date tabs.

A reminder will occur on all dates you specify in ANY and ALL tabs.

Daily -

Repeat the transaction every X number of days. This can be any number from 1 to 100,000.

For example - If you are paid bi-weekly you could set a reminder to repeat every 14 days.
If there is a payment you need to make every 2 years, you could set it to repeat every 730 days.

Weekly -
Repeat the transaction weekly on a set day. Or repeat every First, Second, Third, Fourth, Fifth, or Last Monday, Tuesday, etc of the Month.

For example - a transaction could be repeated on the second and fourth Tuesday and Thursday of the month.

Monthly -

Repeat the transaction on specified days of Every, Every Other, Every Third, Every Fourth, or Every Sixth month.

For example - a transaction could repeat on the 1st and 15th day of every third month.

Annually - Repeat the transaction on the same day, once each year.