  Space-time dependence of the anomalous exponent of electric transport in the
disorder model is presented. We show that the anomalous exponent depends on
time, according to the time-evolution of the number of the effective
neighbouring sites. Transition from subdiffusive to normal transport at
long-enough time is recovered. The above result indicates that the spatial
structure, specifically the network structure, of the hopping sites might be a
novel element which determines the anomalous exponent. This leads to the
feature that the scaling property of the electric transport to time is
insensitive to other elements, such as the distance of the sites or the spatial
dimension of the system. These findings are verified by means of Monte Carlo
simulation. The relation of the result to the conventional knowledge of the
Multiple Trapping Model is shown by deriving it as a special case of the
disorder model.
