How long is the period of deferral if the first quarterly payment of a deferred annuity will

Question:

How long is the period of deferral if the first quarterly payment of a deferred will be paid 3 1/2 years from today?
Annuity
An annuity is a series of equal payment made at equal intervals during a period of time. In other words annuity is a contract between insurer and insurance company in which insurer make a lump-sum payment or a series of payment and, in return,...