I think of kalpa as abstractly like a cycle, whether that is a cycling of thoughts, or a cycling of the universe. Maybe it is also occasionally used in the sense of an entire cycle of one’s life? And if the underlying concept is an abstract cycle, are these really entirely different meanings, or just an abstract idea applied in various contexts? Some religious texts do have a bit of play, or shifting between a macrocosm of the physical universe, and a microcosm of the individual body or mind.
I’m reminded of this post from a while back, which seemed to be a bit along the same lines: