What does Coupon payment structures mean？

Coupon payment structures refer to the frequency and timing of interest payments made to bondholders by the issuer of a bond. The coupon payment structure can be fixed, meaning that the interest rate and payment schedule are predetermined and remain constant throughout the life of the bond, or it can be variable, meaning that the interest rate and payment schedule can change over time based on market conditions or other factors. Coupon payment structures can also vary in terms of the frequency of payments, with some bonds paying interest annually, semi-annually, quarterly, or even monthly.