How to make it so enemies have delay between attacks?

Most people like to use a debounce, like so:

local debounce = false -- Basically a debounce for your delay.
local delay = 5 -- seconds before they can attack again.

function onTouched(otherPart)
    local h = otherPart.Parent:FindFirstChild('Humanoid')
    if h then
    debounce = true
    h.Health = h.Health - 25
    script.Parent.Impact:Play()
    wait(5)
    debounce = false
    end
end

script.Parent.Touched:Connect(onTouched)

Use debounce, because if you put wait(5) in the onTouched event it will just wait inside the function, it won't wait for all touched events

local debounce = false
function onTouched(part)
if not debounce then -- check if debounce is false
local h = part.Parent:findFirstChild("Humanoid")

if h~=nil then
debounce = true -- there is a character so we enable debounce to prevent it from loading again
h.Health = h.Health -25

script.Parent.Impact:Play()
wait(5) -- we wait 5 seconds

debounce = false -- we disable debounce so this can run again
end
end
end

script.Parent.Touched:connect(onTouched)

how would i make it so that when it touches th