Is there any number ED generates to indicate the rate of rotation of Neutron Stars, black holes or just stars in general?
It will just be the rotation period of the neutron star that indicates this, but you'd have to look at the journal to see anything interesting. The faster ones will have periods that are too short to display in the number of decimal places that the UI permits.
For example, the fastest one we have on record rotates about once per millisecond (Cieso JF-Z d188 A).
EDIT: And this isn't actually as absurd as it seams. In reality, the "millisecond" pulsars will actually rotate hundreds of times per second, possibly with periods that are most easily measured in numbers of milliseconds, hence the name. They usually require a close binary companion in order to reach these speeds, by stealing mass from that other star. They will speed up due to conservation of angular momentum. If there is no close binary companion, it probably means that it's consumed and destroyed the other star.