Having a issue with Vector3.Slerp

I am currently trying to code recoil and watched a video to help me out but for some reason the .Slerp keeps coming up as a error

Heres the error:

There is no argument given that corresponds to the required formal parameter ‘t’ of 'Vector3.Slerp(Vector3, Vector3, float)

Heres my code:

using UnityEngine;

public class Recoil : MonoBehaviour
{
//Rotations
private Vector3 currentRotation;
private Vector3 targetRotation;

//Hipfire Recoil
[SerializeField] private float recoilX, recoilY, recoilZ;

//settings
[SerializeField] private float snappiness, returnSpeed;

void Start()
{
    
}

void Update()
{
    targetRotation = Vector3.Lerp(targetRotation, Vector3.zero, returnSpeed * Time.deltaTime);
    currentRotation = Vector3.Slerp(currentRotation, targetRotation * snappiness * Time.fixedDeltaTime);
    transform.localRotation = Quaternion.Euler(currentRotation);
}

public void RecoilFire()
{
    targetRotation += new Vector3(recoilX, Random.Range(-recoilY, recoilY), Random.Range(-recoilZ, recoilZ));
}

}

Yes, as is most cases the error message tells you exactly what to do. Lerp and Slerp always expect a third argument which is a number between 0 and 1 that tells Unity what value to return.

Simple example in 1D:

 returnValue = FirstArg + (SecondArg - FirstArg)* ThirdArg;

Your code regarding Slerp just gives 2 argumets to Unity. The Interpolation value is missing.