How many days can employee accumulate for his...

According to the Kuwaiti Labor Law, it is not permissible to collect vacations for more than two months, according to Law No. 70
Article (70)
The worker shall be entitled to a 30-day paid annual leave. However, the worker shall not be entitled to a leave for the first year of work except after at least 9 months of service for the employer. Official holidays and sick leaves during the year shall not be counted as annual leave. The worker shall be entitled to a leave for the fractions year in proportion with the period he spent in actual service, even the first year of service.
Article (71)
The worker shall be paid for his annual leave before taking such leave.
Article (72)
The employer shall have the right to determine the date of the annual leave and divide such leave after the first 14 days thereof, with the consent of the worker.
The worker shall have the right to accumulate his leave entitlements provided that they do not exceed two years and he shall be entitled to take his accumulated leave all at once subject to the approval of the employer.
*** Therefore, this paid vacation is not possible for the employer to derogate from as a leave without pay, so the leave without pay has nothing to do with emergency leave, and you have the right to claim its value.