We propose to map a vast swathe of Q-E space in four temperature regimes of FeGa2S4 polycrystalline sample on LET. Observation of long- and short-range dynamic spin correlations in this quasi-2D frustrated triangular lattice S=2 antiferromagnet and its temperature evolution will allow to reconcile presently disconnected experimental findings and to distinguish the appropriate theoretical model from a number of the proposed ones.