happening, published etc once every three months: a quarterly journal; quarterly payments.
az: üç aylıq, rüblük
ru: (по)квартальный
♦ adverb
once every three months: We pay our electricity bill quarterly.
az: üç ayda bir
ru: ежеквартально
♦ noun (plural ˈquarterlies)
a magazine etc which is published once every three months.
az: üç aydan bir buraxılan jurnal
ru: ежеквартальное издание