<agent type="Sitecore.Tasks.PublishAgent" method="Run" interval="00:00:00">
  <param desc="source database">master</param>
  <param desc="target database">web</param>
  <param desc="mode (full or incremental)">incremental</param>
  <param desc="languages">en, da</param>
</agent>

<agent type="Sitecore.Tasks.PublishAgent" method="Run" interval="00:00:30">
     <param desc="source database">master</param>
     <param desc="target database">web</param>
     <param desc="mode (full or incremental)">incremental</param>
     <param desc="languages">en, da</param>
</agent>