First of all, I'd kill "still"; it's redundant. That leaves you with this:
No matter how many times she'd practiced this conversation in the mirror, it wasn't any easier.
First of all, I'd kill "still"; it's redundant. That leaves you with this:
No matter how many times she'd practiced this conversation in the mirror, it wasn't any easier.
You don't really need the "had," even as a contraction, either. "Practiced" makes it clear that it's in the past, "many times" that it's repetitive.
First of all, I'd kill "still"; it's redundant. That leaves you with this:
No matter how many times she practiced this conversation in the mirror, it wasn't any easier.
Or
No matter how many times she practiced this conversation in the mirror, it never got easier.
Or even, if you really see got as an evil rotten no good auxilliary
No matter how many times she practiced this conversation in the mirror, it never became easier.