You can even measure the temporal widths of what you call frames now by fMRI and other methods—about 300 millisecond slabs of real time but much blurrier in the CNS’s temporal integration/processing timebases.
One odd feature of all work in neuroscience is the unwarranted assumption that the brain has a timebase in the same way that a digital computer has an oscillator clock. That is obviously not true. The hundreds/thosands of brain subsystems have to learn and make their own quirky/noisy timebases and they have to mesh functionally to each other snd to world time via adaptive well-timed behavior. Arguable job number one if consciousness is creating an internal representation of nowness. Even trickier than managing distributed computing across a continent of infrastructure and latencies.
Arguing in your favor, rhythms may be important in getting closer to an adaptive coordination of activation and inhibition. Retinal waves during development are thought to contribute (controversially) to retinotopic maps. The big question again is How does the CNS-body achieve adaptive temporal integration and functional harmony? No one knows.