public function getSearchStatistics(int $rootPageId, int $days = 30, $limit = 10)
    {
        $now = time();
        $timeStart = (int)($now - 86400 * $days); // 86400 seconds/day
        $limit = (int)$limit;

        return $this->getPreparedQueryBuilderForSearchStatisticsAndTopKeywords($rootPageId, $timeStart, $limit)
            ->execute()->fetchAll();
    }