It depends on what you're using it for. Unless you need the bleeding edge of new stories, 30-45 minutes between each scrape is probably fine. If you're looking

It depends on what you're using it for. Unless you need the bleeding edge of new stories, 30-45 minutes between each scrape is probably fine. If you're looking to stay on top of 'new', your best bet is about every 10 minutes. More frequent than that, and you're just causing trouble for the server with no real benefit for yourself.