Iksar Shaman - Solo Challenges?

[Duik]

So doc brown is saying 2ppm may be true (over the whole liftime of everything) but he is trying to determine the difference and chances of a proc happening AND at what point in a short battle it happens?
Each 2 mims there could be a proc but just cuz there is none dont mean one will come next minute.
Just cuz there is a proc this minute dont mean there wont be one again that minute. They are seperate entities unreliant on each other.

I -- edit-- DONT --edit-- fully get his math but im getting the difference between 2ppm and the statistical chances of and distribution of proc(s) during a battle of x length.