They described it as a Frawqirg because it was easy. The class was never given a name except "light destroyer". They came up with Frawqirg because in the HooT novel one of the Kilrathi destroyers is the Frawqirg, but i dont think it ever mentioned which class the destroyer actually was, so that still might not be right. It could be a heavy destroyer. Anyways my point was that the Fleet Tactics just gave the class the name Frawqirg because that is the only destroyer named in HooT.
You'd think they'd have an original dying message from that ship. I mean you spend half your life trying to destroy it and all you hear is 'My death is at hand...' Shame they didn't come up with something that could make you feel proud to have killed the gigantic beast.