It depends on base, rank etc. I have always done just about 900 a year. Some years been stood down because I ran out of hours. Not too sure about first officers though, but I would be surprised if anyone did less than 700.
Summer much busier than winter, but I've never done less than about 40 hours in a month, even when things were very quiet. There are almost two months a year leave, so there is only ten months to do the flying in.