Attributes in Degenerate Dimension or in Separate Dimension

Hi,

Assume we have a Fact table with millions of rows that have a UniqueID and a LengthOfStay (plus there are numerous other dimensions).

From this Fact table I create a degenerate dimension with UniqueID in it. LegnthOfStay has about 500 different values. Would it be better to have LengthOfStay as an attribute in this degenerate dimension or to have it as a separate degenerate dimension?

What if LengthOfStay had 50 different values?

And what if it had only 2 different values?

Thanks

A-B-M