На сайте МВД написано, что при течении 3-4 лет, 90 дней отсутствия в год так же не считаются отсутствием. То есть 90 дней в год можно отсутствовать на протяжении всего периода. (a) Legal and continuous residence for 12 months immediately preceding the date of application. Periods of absence that do not exceed a total of 90 days do not interrupt the stated time period. (b) During the immediately preceding 10 years from the 12-month period, to have legal residence for cumulative periods of no less than 4 years or 3 years depending on the level of knowledge of the Greek language, i.e. A2 or B1 respectively. Periods of absence that do not exceed a total of 90 days per year are not counted as absence.