The beat the song is built on is one bar, played through bars 17-19, 21-23 and 25-27, and 9 more places -- 24.6% of every bar the kit plays. This one moves around more than most: the beat is where to start, not the whole job.
It is played on hi-hat, snare and kick, counted in sixteenth notes. On its own it scores 50 out of 100 -- a step up -- and the thing that decides that is the speed of the hand keeping time.
The whole song is 66 out of 100, so the beat is not the hard part: what costs you is everything around it, the joins and the fills.
A part this hard is not learned by playing it slowly and hoping. The room opens it on its simplest reduction -- the timekeeper alone, at 92 BPM -- and adds the notes back over 3 rungs, each with a tempo to reach and a gate to pass before the next.
Tempo goes 92, 107 and 122 BPM, and the gate at each one is 8 loops in a row with no wrong note and no wobble in the time.
PRACTISE THIS BEAT →A one-bar groove on hi-hat, snare and kick, in 4/4 at 122 BPM, counted in sixteenth notes. It is written out above, and it covers 24.6% of the bars the kit plays.
Bars 17-19, 21-23, 25-27 and 29-31, and 8 more places. The time is kept on the silence to start with, and it changes 18 times over the song.
50 out of 100 on its own -- a step up. The song as a whole is 66 out of 100: demanding, mostly on how often it moves around the kit.