need help with ContentProvider:PreloadAsync?

I'm not sure if that's how to use this service, I followed some parts on the devforum and it's kinda confusing, maybe just a little

local contentprovider = game:GetService("ContentProvider")
local assets = {}
			local gameparts = game:GetDescendants()
			for _,v in pairs (gameparts) do
				table.insert(assets,v)
				for i = 1, #assets do
					local parts = assets[i]
					contentprovider:PreloadAsync({parts})
				gui.Frame.TextLabel.Text = "Loading...("..i..")"
				if i == #assets then
				gui.Frame.TextLabel.Text = "Loaded!"
				wait(.5)
				end
end
			end

Just add the assetids in the assets value and separate them with commas.

Example: local assets = {2522774790,73737627}