Is there a way I can put a cooldown on my GUI to prevent spam?

SuggestionManager Script - (ServerScriptStorage)

local HttpService = game:GetService("HttpService")
local WebhookURL = "https:/wlSrdTP6FvqGPcwE7QZuidoaHoef3nV0iz_-HZkc6-H6U7b0En" --<<--WEBHOOK URL HERE

local function postToDiscord(Message)
	local Data = {
		["content"] = Message
	}
	Data = HttpService:JSONEncode(Data)
	HttpService:PostAsync(WebhookURL, Data)
end

game.ReplicatedStorage.Suggest.OnServerEvent:Connect(function(Player, Suggestion)
	postToDiscord("Suggestion from " .. Player.Name .. ": " .. Suggestion)
end)

SuggestionScript - (StarterGui)

local Player = game.Players.LocalPlayer
local ToggleButton = script.Parent.ToggleButton
local SuggestionFrame = script.Parent.SuggestionFrame
local SuggestionBox = SuggestionFrame.SuggestionBox
local SubmitButton = SuggestionFrame.SubmitButton


ToggleButton.MouseButton1Click:Connect(function()
	if SuggestionFrame.Visible == true then
		SuggestionFrame.Visible = false
	else
		SuggestionFrame.Visible = true
	end
end)

SubmitButton.MouseButton1Click:Connect(function()
	local Suggestion = SuggestionBox.Text
	game.ReplicatedStorage.Suggest:FireServer(Suggestion)
end)

The Map for the GUI is

StarterGUI
|_
   SuggestionGUI
       |_
          SuggestionScript
          Suggestion Frame _
                                          |_
                                             SubmitButton
                                             SuggestionBox