I would like to make sure I understand how time trigger automations work, does setting the minutes to “/16” as shown below mean the automation runs once an hour on the 16 minute mark (8:16, 9:16, 10:16) or does it mean it runs every 16 minutes inside the hour (8:16, 8:32, 8:48)
What you have posted is the closest basic trigger to run every 16 minutes inside the hour, but will also trigger on the 0 in addition to 16, 32, and 48. If you don’t want that you can use a template condition to reject the 0 trigger.