The period entirely depends on the present state of your seller account. A seller account can be suspended 3 times and the suspension duration have different time span.
If you are nominated for suspension for the very first time the suspension period last for (10 days). This means you must have made 3 consecutive failed order delivery or order request
This means the online store will not be able to receive payments or make sales from their online store for the next 10 days
The next time you are nominated for suspension will last for (20 days) after 2 consecutive failed order delivery or order request
Third nomination for suspension will last for (30 days) after 1 consecutive failed order delivery or order request
To avoid account suspension try to always make your delivery to customers on time for vendor accounts or send your products for stocking before the deadline for merchant accounts