I’ll back him up - I do thousands of kilometres a month and log component changes when they happen!
My rear brake pads last about 5000km before they need a change, my front brake pads last about 3500km.
It would appear by observation of the consumables that the front brakes do the most work. This is in-line with my expectations from the experience riding the bike and established knowledge about how weight transfer works in vehicle braking - there is a reason cars always have bigger discs on the front and some cheap hatches still have drums on the rear.
