For this UNGODLY hell on earth (for some of us) grind for this elusive recipe, I thought I would start a thread for us with alchemy and working on this to give an idea of what kind of drop rate we are looking at. The drop rate information on wowhead is inaccurate, because it is also taking into account drops on characters that do not have Alchemy, maybe we can start getting a clearer picture here.
I, myself am working on Canopic Jar #7 at the time of writing this.
(I will also take the time to point out I have an 85 alt with max alch / arch)