To clarify previous poster post :

Everyday a random number between 1,2 and 3 is chosen .

Let's say 1 is chosen then for every instance you were garanteed a frag on the first (out of 3) sweep .

If 2 is chosen then you will always got the frag on the 2nd sweep (out of the 3)

and if 3 then it was on the third sweep .

The way to determine which number it was was to sweep 3 times any instance and look at reward .

If frag is only obtained in one of the 3 sweeps then that the number of the day .

If multiple frag obtained on various sweep simply sweep another instance 3 times and note the sweep where you both obtained the frags .

So If results are

First 3 sweeps :

-Frag

-Material

-Frag

--> this means that it's either the first or the 3rd sweep that will always give a frag

2nd 3 sweeps (on the same day)

-Frag

-Material

-Material .

Then that means 1st sweep is guaranteed frag .

This save lots of stamina due to the fact that you don't have to sweep 3 times every instance just to get 1 frag .