frame skip values

[A-Man]

Three wait: 0 frames equate one wait: 1 frame.
Thus there is an in between possible.

What? How?
I believe here is how it works in terms of code:

Code:

void UpdateFrame(){
    if (delaycounter==Frame[current_frame].wait){
        delay_counter=0;
        current_frame=Frame[current_frame].next;
    }else{
        delay_counter++;
    }
}

Correct if I am wrong.