Getting N most played tracks may be a bit heavy as a query, but please take a look at the smart playlist criteria – you probably could either do something with play_count > 5 and time_played after 1 week before today.
Not exactly the same, but getting songs that got played more often than 5 times in the past seven days (feel free to adjust both playcount and timeframe) is near your request imho.
FireFly Media ServerThe original FireFly Media Server