Depends on a lot of variables, I'd think:

- How dense is the wood?

- How much wood does each pip remove?

- How much water does the wood absorb per unit of volume?

- Are any capillary effects at play transferring absorbed water into the rest of the die?

- Is it better to soak the 6 side to take advantage of more surface area? Or the 1 side to take advantage of more soakable volume?

- Is the wood even uniformly dense to begin with?