Annuities
An annuity is a series of payments made at equal intervals.[1] Examples of annuities are regular deposits to a savings account, monthly home mortgage payments, monthly insurance payments and pension payments. Annuities can be classified by the frequency of payment dates. The payments (deposits) may be made weekly, monthly, quarterly, yearly, or at any other regular interval of time. https://en.wikipedia.org/wiki/Annuity