"Constant renewal" refers to the ongoing process of changing or improving something consistently over time. It suggests the idea of not staying the same, but continuously refreshing, updating, or rejuvenating. Full definition
In other words, the decision of faith is never final; it needs constant renewal in every fresh situation. (religion-online.org)
This option allows you to continue receiving your subscription while automatically being charged for a new term year without the hassle of constant renewal reminders or your subscription being terminated or suspended. (internationalliving.com)
What's more, most insurance companies will provide constant renewal on an old policy. (insuranceproviders.com)