title: Crone to be executed every 40 minutes and 3 hours
body: <p>i am looking to execute a crone job in Linux. it should run every 3 hour and 40 minutes.</p>
  
  <p>I have tried */40 */3 * * * command, I am not getting this properly executed. </p>
  
  <p>thanks in advance .     </p>