How do you speed up WaitForSeconds in a coroutine when you want the number to be less than 1?

I am trying to create a program that will spawn balls from the top randomly at random times. The problem is it is not fast enough, but if I change the value to like 1/2 it spawns 50 super fast.

using System.Collections.Generic;
using UnityEngine;

public class SpawnAstroids : MonoBehaviour
{
    public GameObject astriod;
    public float xBounds, yBounds;
    public int playerPoints = 0;
    public int enemyPoints = 0;

    void Start()
    {
        StartCoroutine(SpawnRandomGameObject());
        
    }

    IEnumerator SpawnRandomGameObject()
    {
        yield return new WaitForSeconds(Random.Range(1,2)); //Random.Range(1/2, 2)
        
        Instantiate(astriod, new Vector2(Random.Range(-xBounds, xBounds), yBounds), Quaternion.identity);

        StartCoroutine(SpawnRandomGameObject());

    }
    
    

}

>Solution :

Unity requires that you specify whether your decimal is specifically a float or a double. Add in f to the end of each decimal number. For example: Random.Range(0.5f, 2);