See drop missing values

Hi fam.

I have a couple IoT sensors.  I want to know how often does the sensor unit transmit per hour, average over 7 days.

Usually the sensors are set on send per 5 min, 10 min or 15 min. I want to see if the sensors missing/drop/lost values during those 7 days.

I think I have to do a measure with the Datestamp column but don't really in which way it's the best. Do you have any idea or tips how I can do it?