facebook number of page views using facebook graph api

I'm using this url for facebook graph api to get page views, and get the following in return:

{
    "data": [],
    "paging": {
        "previous": "http://ift.tt/1IgTnxW",
        "next": "http://ift.tt/1IgToli"
    }
}

in some queries date time error that must be unix or date time format. I can share you my access token. I urgently need number of page views and also tell me since and until format