Fri Apr 28, 2017 10:02 pm
Welcome!
It's not a standard length of time that anyone in the community would know (without having conducted the same transaction with the same exchange in the past).
Have you tried contacting the exchange with your question? They may have a standard time.
Transactions from Coinbase using a credit card are instantly posted to your account, whereast bank transfers require about 7 days.
How long have you been waiting?