Get post view by dates

Hi, i’m trying implement a function that will retrieve post view by dates but it’s not working for me. this is what i use:
function get_post_views_data($post_id) {
$views_data = array();

for ($i = 0; $i < 30; $i++) {
    $date = date('Ymd', strtotime("-$i days"));
    $views = pvc_get_post_views($post_id, $date, $date);
    $views_data[$date] = $views;
}

return array_reverse($views_data); // Chronological order

}

Can you advice what hook should i use to get the post view dates?

Thanks in advance,
Simon.