Yes, the other point is that the “time” experienced in higher realms would feel much shorter than the one in the human one, right? During the void and the formation phase, beings are essentially brahmas. So more than likely, it’s an analogy used to describe the sheer length that is difficult to calculate. From Science, we know that astronomical phenomena span billions of years but Einstein’s relativity makes things more challenging.
A Quest to Recover Buddha's True Teachings