I think the general assumption that practice just happens. It's a normal thing for teams to have practices when they're not playing games. It's sort of like breathing. But it's not the same thing as a focused training.
Here's where I could go on about how skills should naturally increase, especially with younger players, due to the natural improvement that come about from general practice, but I won't. I don't know if Experience grows just by virtue of a player getting older and being on a team. If so, perhaps this natural improvement could be seen in Experience growth. If not, then perhaps this adjustment should be made, too. I'm such a revolutionary.
But enough of this, back to free throws.
Don't ask what sort of Chunks they are, you probably don't want to know. Blowing Chunks since Season 4!