title: node-cron run job every 3 hours
body: <p>I am trying to run a node-cron job every 3 hours and I am not sure if I am doing it right.</p>
  
  <p>Right now I am using:</p>
  
  <pre><code>* * */8 * * *
  </code></pre>
  
  <p>Is this correct?</p>