The interbout arousal rhythm

Hibernation is punctuated by periodic interbout arousals. On the shared substrate this is a slow relaxation oscillator -- the same FitzHugh-Nagumo form (R19 switch plus a slow recovery variable) used across the neuro package. It oscillates here (True, 6 beats in the probe); the period in days is a cited anchor.

RH6. The arousal rhythm is not a new mechanism: the R19 switch with a slow recovery gives a low-frequency oscillation by construction. Mechanism [V]; the interbout period (days) is [L], an external anchor rather than a derived rate.

A slow relaxation oscillator

The recovery variable sets the period, so the intrinsic rhythm is far slower than the switch timescale -- exactly why the substrate 'speaks at low frequency'. The torpor-arousal node reuses this directly; the probe confirms it cycles (6 beats).

Rate is an anchor, not a derivation

The interbout period (order of days) is [L]: a cited physiological anchor. The substrate gives the OSCILLATORY FORM for free; it does not set the absolute period, which depends on recovery time constants taken from measurement.