Alternatively, you could add a drop down to select the granularity and then use a single slider control.
Edit: This is based on just seeing the reddit one, BTW. I tried to check out yours, but it seems that it's popularity has flooded the server.
it seems that it's popularity has flooded the server.
Try again - it's not the load but something weird in my Apache setup (I'm suspecting Passenger) that causes it to pass out every now and then load or not :-(