public function findAllKeywords($limit = 10) : array
    {
        $lastSearchesResultSet = $this->getLastSearchesResultSet($limit);
        if (empty($lastSearchesResultSet)) {
            return [];
        }

        $lastSearches = [];
        foreach ($lastSearchesResultSet as $row) {
            $lastSearches[] = html_entity_decode($row['keywords'], ENT_QUOTES, 'UTF-8');
        }

        return $lastSearches;
    }