"ongoing cycle" is correct and usable in written English.
You can use it to describe a continuous, repeating process of events. For example: "The ongoing cycle of seasons is an example of the natural forces of our planet."
This pattern reflects in part the ongoing cycle of economic prosperity and hardship.
Normally, skin cells mature and are shed in an ongoing cycle of 28 to 30 days.
The ongoing cycle of the London theater exerts its own allure.
That takes the firm back to the Learn step, thus creating an ongoing cycle of learning and renewal.
What's more, a single round of action followed by a reciprocal response can work itself into an ongoing cycle.
There is an ongoing cycle of death and rebirth that is a part of our everyday lives, though it remains largely invisible.
Michael Tanner claimed the ongoing cycle could stand comparison "in terms of musical interpretation and commitment, to any Ring one might see in the world".
This deeply gifted musician is emerging as one of the master pianists of our time, as an ongoing cycle of Beethoven sonatas on the Harmonia Mundi label shows.
The goal of the class is for each student to increase his or her own leadership abilities through an ongoing cycle of practice, feedback and reflection.
Conclusions: In vitro fertilization and embryo transfer can be accomplished with minimal precycle testing and ongoing cycle monitoring without compromising fertilization, implantation, and ongoing pregnancy rates.
In the introduction, he points to the shifting versions of Lois over time and observes that she "embodies the progress and struggles of American women, an ongoing cycle of advances and setbacks".
