Input press to play different animation to input hold?

Is this possible? I'm trying to make a button press do a jumping animation and action whilst trying to make a button hold do a sliding animation and action, I feel like there is a simple answer but I can't seem to find anything to do with monitoring how long the button is pressed down for as I know this would make it much easier.

Currently I have it so that it can change but as this code was written by my lecturer I'm not 100% sure I understand what it does. It's a 2D one button game I'm making. Here is my code that is related to my issue, any help appreciated.

 private float slideTime = 1.0f;
 public float jumpTime = 1.0f;
 
 ...
 
 void Update() {
         if (Input.GetKey(KeyCode.Space) && Time.time > slideTime) Slide();
     }
 
 ...
 
 void Jump() {
         if(Input.GetButtonDown("Jump") && Time.time < slideTime)
         {
             audio.PlayOneShot(JumpSound2);
             rigidbody2D.AddForce(new Vector2(0, jumpSpeed));
             anim.Play("Jumping");
 
         }
     }
     void Slide() 
     {
         if(Input.GetButtonDown("Jump") && Time.time > slideTime)
         {
                 slideTime = Time.time + jumpTime;
                 anim.Play("Sliding");
         }
     }