half hourly
/hæf ˈaʊərli/
adjective
- Happening or done every half hour.
- We set a half-hourly alarm to remind us to stretch during the long drive.
- The nurse made half-hourly checks on the patient's temperature.
- The train station has half-hourly departures to the city.
adverb
- Every half hour.
- The weather report is updated half-hourly during the storm.
- She checks her email half-hourly when she is expecting an important message.
- The bus runs half-hourly from 6 a.m. to midnight.