According to stackoverflow you cannot do it in a single statement. The recommendation is to use two statements:
0 */5 * * *
30 2,7,12,17,22 * * *
-150m may be good to search for records in last 2.5 hours but it does not satisfy cron criteria. I need the search to run every 2.5 hours and when i try this it throws an error.
Encountered the following error while trying to update: In handler 'savedsearch': Invalid cron_schedule="*/150 * * * *"