code: public function countOtherNodeWithSameSpecialPageName($nodeId, $siteId, $language, $name)
      {
          $qa = $this->createAggregationQueryBuilderWithSiteIdAndLanguage($siteId, $language);
          $qa->match(
              array(
                  'nodeId'   => array('$ne' => $nodeId),
                  'deleted'  => false,
                  'specialPageName' => $name
              )
          );
  
          return $this->countDocumentAggregateQuery($qa);
      }
docs: @param string $nodeId
  @param string $siteId
  @param string $language
  @param string $name
  
  @return int