0 */5 * * * * echo first job #first job; every 5m
0 */15 * * * * echo second job # second job; every 15m
0 */25 * * * *  echo third job #### third job; every 25m
0 */35 * * * *  echo fourth job              #4th job; ever 35m
0 */45 * * * *  true 
