Bile Retcher Kill

Instants are counted from their success event and hard casts from their cast start, because the 3.3.5a client only ever logs one or the other. A hard cast interrupted before it landed still counts — nothing in the log distinguishes it. A few spells, Arcane Missiles among them, this client announces not at all: those are counted from their own ticks instead, one cast per burst of them.

Gbs Frost 12 casts

Spell	Casts	Per min
Frost Strike	4	11.4
Obliterate	2	5.7
Pestilence	2	5.7
Howling Blast	1	2.8
Blood Strike	1	2.8
Plague Strike	1	2.8
Icy Touch	1	2.8