Raycast cooldown timer?

I need help placing a cool down on a destroy object code I made.
I want to make it where the player has to wait X amount of time to be able to destroy another object.

I’m using C# if it wasn’t obvious.

using UnityEngine;
using System.Collections;

public class RaycastBreak : MonoBehaviour {
	void Update() {
		if (Input.GetMouseButtonDown(0)) 
			Ray ray = Camera.main.ScreenPointToRay(Input.mousePosition);
			RaycastHit hit;
			if(Physics.Raycast(ray,out hit, 5))
				if(hit.collider.gameObject==gameObject) Destroy(gameObject);

Any suggestions or answers are greatly appreciated

How about a co-routine? Place lines 8 through 13 in a new method called TryDestroyWithMouse(){}.

Call TryDestroyWithMouse(); when LMB is down.

void Update() {
    // if LMB down, TryDestroyWithMouse();

private bool isReady = true;

IEnumerator CoolDown() {
    yield return new WaitForSeconds(1); // wait 1 second
    yield break;

void TryDestroyWithMouse() {
    if (!isReady) return;
    // lines 8 through 13 here