"not regular enough" is correct and can be used in written English.
You can use it when someone does not meet the standards or criteria of something, or when something does not happen as frequently as expected. For example: "The students' attendance at lectures was not regular enough to guarantee success."
Note that, in the case the function (h(s)) is not regular enough, then we can remedy it by multiplying and dividing by '(K_{1}s^{alpha }+K_{2}s^{beta})' instead of multiplying and dividing by 's' in (8).
However, for the general case, we shall explain in Remark 1.2 below that, the solution (P,Λ) (to (4)) found in (Tang 2003) is not regular enough to serve as the design of feedback controls for Problem (SLQ).
And yet here I am too, this gauzy world of pure inspirational women fed to me on a basis that's regular, but not regular enough that I'm always guessing when I'll get it next.
The unique selling point for retailers is that, while some power shoppers might download those stores' apps, Shopkick offers a "shopping mall" style experience where several stores can get their products and brands in front of shoppers who may not be regular enough to use their own bespoke apps.
It certainly wasn't in regular enough usage to be the markings that would be used on a mobile phone keys', even if there was a civilisation that had the ability to make one.
Livestreaming might not be a regular enough behavior that it can thrive as an entire app.
The game's inducements to exercise are not regular or forceful enough; you will get sucked into this mesmerizing game if you are not strongly, insistently motivated to lose weight as you play.
They also reported that health education about cervical cancer was not regular and was not given enough time to address all issues, due to the heavy work load.
It is clear that our approximation of σ using the delta-method relies one two major assumptions: 1) the distribution of N is Gaussian; 2) F+ is regular enough (e.g. not too steep) around E. When m grows, E closes to the boundary of the definition range of F+ hence degrading assumption 2.
To find out if you should use it, work out whether or not you are not eating enough regular protein.
