It seems there are several ways to search hard coded (overridden) dimensions. However, the FIND command does not locate dimensions that are not overridden.
Example, I want to find all dimensions that are 12'-0". If I 'FIND' 12'-0", it will only locate dimensions that I have forced to 12'-0".
I suppose you could search for those dimensions that were over-ridden and force them to a special layer. Once done, freeze that layer. Any dimensions left showing would be those that were not over-ridden.
That would allow me to isolate one type from the other. Ultimately, I'm trying to obtain a total count of both on a drawing that contains MANY various dimensions. Hiding one type would still leave me manually searching for the others.