Here: https://developers.facebook.com/docs/graph-api/advanced/rate-limiting
Page-Level Rate Limiting
These limits apply to calls made using a page access token. Your app will receive error code 32 if you hit these limits.
The blog post at https://developers.facebook.com/blog/post/2016/06/16/page-level-rate-limits/ provides a detailed explanation of page level rate limiting.
and here: https://developers.facebook.com/blog/post/2016/06/16/page-level-rate-limits/
