assuming 到 spaced periods这句话是什么意思

问题如下：

DMT Corp. issued a five-year floating-rate note (FRN) that pays a quarterly coupon of three-month MRR plus 125 bps. The FRN is priced at 96 per 100 of par value. Assuming a 30/360 day-count convention, evenly spaced periods, and constant three-month MRR of 5%, the discount margin for the FRN is closest to:

选项：

A.

221 bps

B.

400 bps

C.

180 bps

解释：

Correct Answer: A

The interest payment each period per 100 of par value is:

The discount margin can be estimated by solving for DM in the equation:

The Correct Answer for the discount rate, r = (0.05+DM)/4 is 1.8025%. Therefore DM = 2.21%, or 221 bps.