SES Easy DKIM key rotation frequency

Hi, what frequency are DKIM keys rotated when using SES Easy DKIM?

I need to fill out a questionnaire around emails being sent out, and one of the requirements is to support DKIM rotation every six months. I can see that AWS SES supports key rotation, but I can't find the frequency.

Ercan mentioned 90 days in answer to this post, but I can't find an official reference to this frequency? https://repost.aws/questions/QUuPAl2F97RseJNexu2JP8CA/2-of-3-easy-dkim-ses-txt-records-where-p-tag-has-no-value-p