The dynamics associated with the dipolar orientation of a nonlinear optical chromophore, nitroaminostilbene (NAS), doped in three different polymer hosts, poly(methyl methacrylate) (PMMA), polycarbonate (PC), acid poly(vinyl chloride) (PVC) is investigated by an electrochromic relaxation technique. The time dependence of the electronic absorption spectrum perturbed by the electric field is measured. The relaxation of the electric-field-induced orientational order is investigated as a function of temperature and dopant concentration. The relaxation time measured below the glass transition temperature (T-g) shows an Arrhenius dependence, with the activation energy increasing with increasing chromophore concentration. The relaxation times obtained from our electrochromic measurements are compared to the decay times obtained from our second harmonic generation measurements. Measurements with three different polymer hosts below each system’s T-g are also carried out. At a given chromophore concentration, the relaxation time varies significantly from one polymer host to another. A pronounced electric-field-induced memory effect in the relaxation time associated with increasing number of poling cycles has been observed with the NAS/PC system.