public static function perDay($days = 1, $date_format = "m-d")
    {
        $hits_per_day = [];

        for ($i = 1; $i <= $days; $i++) {
            $hits_count = self::interval(Carbon::now()->subDays($i), Carbon::now()->subDays($i - 1));

            $hits_per_day[Carbon::now()->subDays($i)->format($date_format)] = $hits_count;
        }

        return $hits_per_day;
    }