How do I continuously shoot with delay?

Ducist145

using System.Collections;

using System.Collections.Generic;

using UnityEngine;

public class Weapon : MonoBehaviour

{

    public Transform firePoint;

    public GameObject bulletPrefab;

    void Update()

    {

        if (Input.GetButtonDown("Fire1"))

        {

            Shoot();

        }

    }

    void Shoot ()

    {

        Instantiate(bulletPrefab, firePoint.position, firePoint.rotation);

    }

}