How to wait 2 seconds before activating a part of code?

rb.isKinematic = false

rb.isKinematic = false

using UnityEngine;

public class GravityOn : MonoBehaviour
{
    private Rigidbody rb;

    void OnTriggerEnter(Collider other)
    {
        if (other.gameObject.tag == "Player")
        {
            // Code to trigger when the collision occurs
            print("Gravity");

            rb = GetComponent<Rigidbody>();
            rb.isKinematic = false;
        }
    }
}

using UnityEngine;

public class GravityOn : MonoBehaviour
{
    private Rigidbody rb;

    void OnTriggerEnter(Collider other)
    {
        if (other.gameObject.tag == "Player")
        {
            // Code to trigger when the collision occurs
            print("Gravity");

            rb = GetComponent<Rigidbody>();
            rb.isKinematic = false;
        }
    }
}