  We report on the study of the thermal dynamics of square artificial spin ice,
probed by means of temperature and frequency dependent AC susceptibility.
Pronounced influence of the inter-island coupling strength was found on the
frequency response of the samples. Through the subsequent analysis of the
frequency- and coupling-dependent freezing temperatures, we discuss the
phenomenological parameters obtained in the framework of Vogel-Fulcher-Tammann
law in terms of the samples microscopic features. The high sensitivity and
robust signal to noise ratio of AC susceptibility validates the latter as a
promising and simple experimental technique for resolving the dynamics and
temperature driven dynamics crossovers for the case of artificial spin ice.
