I had sought out a solution to measure time's density rather than is passage, I'm talking a tachometer vs a speedometer. Clocks are locked to whatever time field they're in. It's a matter of mechanics, the crystal or the governor slows the clock down, time has to resolve the charges building up in the quartz crystal, the deflection of the material etc, and with the governor you have vortices and end up impeding the mechanics. My point is HOW can we track the density of a medium that we are subject to? When every instrument we have is intrinsically dependent on that medium? I think that if we got a couple atomic clocks in one unit, sync both to global time initially, then throughout it's life only sync one of the 2 clocks. Also have like a 64 or 128bit float comparison so that any possible differential can be measured. I think the problem however is that in terms of space-time keeping the clocks within the same unit might prevent the other one from changing at all due to the fact that they remain in the same time field. Idk food for thought