I’d say technically Ingrid got less that that. She appeared briefly in 402 but only became arc villain in 403. She was defeated in 410, so really 403-410…only 8 episodes, and for one of those episodes (409?) she really did nothing but shatter a mirror and then watch it move.
Well, you do have to account for 408 being two hours long. It might technically only be one episode, but it’s double the screen time.