The phrase "are not periodically" is correct and usable in written English.
It can be used when discussing events or actions that do not occur at regular intervals.
Example: "The updates to the software are not periodically released, which can lead to confusion among users."
Alternatives: "are not regularly" or "do not occur periodically".
Once listed, species are not periodically reviewed and the department "does not know whether the extinction risk for these species has changed or remained steady".
Grid cells, defined by their striking periodic spatial responses in open 2D arenas, appear to respond differently on 1D tracks: the multiple response fields are not periodically arranged, peak amplitudes vary across fields, and the mean spacing between fields is larger than in 2D environments.
These minima and maxima are not periodically depending on the voltage and must be symmetric, meaning that they must appear at the same absolute value of the voltage for both bias polarities.
This finding suggests reduced growth and leaf burn even at the lowest ion concentrations if salts are not periodically leached from the soil.
At the same time, we select 454 non-cell cycle genes that are not periodically expressed in any of the 6 datasets (p-value > 0.1).
Errors in using the test may be introduced gradually and go unnoticed if experiences and problems are not periodically discussed and evaluated [ 15].
If these workers aren't periodically connecting, in person, around issues that matter, they'll find themselves disconnected from their colleagues and the driving mission of their unit.
Consider the possibility of a living mulch, a perennial cover-crop plant that is not overly competitive or that is not periodically weakened by mowing.
"The fact that drainage is not periodically and regularly maintained is the main problem, but the fact that citizens throw their garbage anywhere they choose degrades the system even farther," said Arjun Thapan, director-general of the Asian Development Bank's Southeast Asia department.
However, it must be emphasised that in our study, the insights from the evaluation were not periodically fed back into the system to enable the local actors (implementers of the intervention and the recipient health managers) to benefit from or reflect on these.
If the instrument wasn't periodically "rated"—recalibrated the vessel risked being wrecked by unexpected shoals.
