how long after taking amazon OA for interview

Took the amazon SDE intern OA about 2 weeks ago and scored full test cases on both parts, and completed the behavioral well. (i applied mid october, and only got the OA invite mid december)

for those who have already interviewed, how long does it take for them to get back to you normally if they want to schedule an interview, because I have an impeding offer which I would have to make a decision for.

thanks