How can I add a 2 minute cooldown in this script?

I want to add a 2 minute cooldown to this script how can I do that?

local part = game.Workspace.Stud
script.Parent.MouseButton1Click:Connect(function()
local number = math.random(1,9)
if number == 1 then
    part.Transparency = 0.1
elseif number == 2 then
    part.Transparency = 0.2
elseif number == 3 then
	part.Transparency = 0.3
elseif number == 4 then
	part.Transparency = 0.4	
elseif number == 5 then
	part.Transparency = 0.5	
elseif number == 6 then
	part.Transparency = 0.6	
elseif number == 7 then
	part.Transparency = 0.7
elseif number == 8 then
	part.Transparency = 0.8		
elseif number == 9 then
	part.Transparency = 0.9	
		end
	end)

If this is a localscript, you can use a debounce:

local part = game.Workspace.Stud
local debounce = false

script.Parent.MouseButton1Click:Connect(function()
if debounce == true then return end
debounce = true

local number = math.random(1,9)
if number == 1 then
    part.Transparency = 0.1
elseif number == 2 then
    part.Transparency = 0.2
elseif number == 3 then
    part.Transparency = 0.3
elseif number == 4 then
    part.Transparency = 0.4 
elseif number == 5 then
    part.Transparency = 0.5 
elseif number == 6 then
    part.Transparency = 0.6 
elseif number == 7 then
    part.Transparency = 0.7
elseif number == 8 then
    part.Transparency = 0.8     
elseif number == 9 then
    part.Transparency = 0.9 
        end

wait(120)
debounce = false
    end)

If this is a server script, you can add a debounce to the part as a boolvalue since that is the object you are affecting.

local part = game.Workspace.Stud
local debounce = part.BoolValue or Instance.new("BoolValue", part)

script.Parent.MouseButton1Click:Connect(function()
if debounce.Value == true then return end
debounce.Value = true

local number = math.random(1,9)
if number == 1 then
    part.Transparency = 0.1
elseif number == 2 then
    part.Transparency = 0.2
elseif number == 3 then
    part.Transparency = 0.3
elseif number == 4 then
    part.Transparency = 0.4 
elseif number == 5 then
    part.Transparency = 0.5 
elseif number == 6 then
    part.Transparency = 0.6 
elseif number == 7 then
    part.Transparency = 0.7
elseif number == 8 then
    part.Transparency = 0.8     
elseif number == 9 then
    part.Transparency = 0.9 
        end

wait(120)
debounce.Value = false
    end)