HALF-HOURLY
Meaning of HALF-HOURLY in English
adjective
happening every 30 minutes :
a half-hourly bus service
► ˌhalf-ˈhourly adverb :
The buses run half-hourly.
Oxford Advanced Learner's English Dictionary.
Оксфордский английский словарь для изучающик язык на продвинутом уровне.
2005