The phrase "a relatively regular" is correct and usable in written English.
It can be used to describe something that is fairly consistent or typical in nature, often in comparison to other things.
Example: "The train service has a relatively regular schedule, making it easy for commuters to plan their journeys."
Alternatives: "a fairly consistent" or "a somewhat typical".
Things have resumed a relatively regular pace in the Hostetler home.
While Mr Parke had never experienced anything like it before, the morning music quiz appears to be a relatively regular occurrence.
"We've got a great rapport," Mr. Perry said, adding that he talks with the former president on a "relatively regular basis".
Happy Boxing Day! 'Tis the time of year for existential crises and a question like this is something I'd ask myself on a relatively regular basis.
The planetaries generally have regular, sharp outer boundaries; often they have a relatively regular inner boundary as well, giving them the appearance of a ring.
"He's making such an impact on games on a relatively regular basis and has been doing for quite a while, but the frequency is becoming more.
The ground beetles (Carabidae) have a rather generalized (primitive) form the flattened, oval body has a relatively even surface, with regular ridges or grooves; antennae and legs are of moderate length and slender.
The shapes and sizes of the needles were relatively regular and ordered in a large area (over a few micrometers).
If we regard the trajectories as representative potential energy profiles, (IV) could serve as an example of a rough terrain in contrast to the small and relatively regular oscillations seen in (I) and (II).
A relatively genteel regular legislative session addressing issues like the budget, water, taxes and education gave way to a special session focused on a couple of deeply contentious political issues: redistricting and regulation of abortion.
Furthermore, note that in the theoretical model, the firm pays a relatively high regular pay during recessions because workers can receive the wage only when they avoid layoffs by working very hard in the previous period.
