In classical mechanics we talk about homogeneous and inhomogeneous gravitational fields. Do we do this with time-differences in general relativity also? For instance; since time beats at a faster rate at high altitude, then in low altitude, can i say that this area is a "inhomogeneous timefield"? Would this expression make sense to a physisist? If no.. Is there any other term which explains that time isnt beating at a constant rate in an area of space?