Given, who was a team-mate of N'Zogbia's at Newcastle United, believes he is lacking a bit of confidence.
"We saw last season at Wigan how good a player Charles is with his goals and the way he causes problems for defences," said the goalkeeper.
"This is a big move for him and with a big price tag. But he is still quite young, so you have to give him a bit of time.
"Confidence is such a big thing for players. Hopefully, though, he'll nick a goal or set one up and that will provide the lift he needs. I know the Villa fans haven't seen it yet, but if they give him time I am sure they will soon see the best of N'Zogbia."