The beat the song is built on is one bar, played through bars 9-15, 17-31 and 41-60 -- 65.6% of every bar the kit plays. Learn that one and the song is very nearly finished.
It is played on hi-hat, snare and kick, counted in thirty-second notes. On its own it scores 73 out of 100 -- demanding -- and the thing that decides that is how many notes a second it asks for.
The whole song is 85 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 42 BPM -- and adds the notes back over 5 rungs, each with a tempo to reach and a gate to pass before the next.
Tempo goes 42, 50, 59, 67 and 76 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 76 BPM, counted in thirty-second notes. It is written out above, and it covers 65.6% of the bars the kit plays.
Bars 9-15, 17-31 and 41-60. The time is kept on the silence to start with, and it changes 3 times over the song.
73 out of 100 on its own -- demanding. The song as a whole is 85 out of 100. Hard, and what makes it hard is how much of it falls off the beat.