With shared care they are meant to give you exact weeks that you book in to see midwives/GP. Maybe they forgot, which is pretty slack! There's some kind of roster that everyone has who does shared care, and it tells you what weeks you see whom.
I would tell you except I never found out as I switched from private to public only a few weeks ago. I did see the GP looking at it though, and it does say that first time mums see the GP and midwife more often, but still subsequent pregnancies go every few weeks. xo