Any rate limit or quota for Azure AD OAUTH2 token endpoint

Question

Currently working on a feasibility study to use Azure AD oauth2 for authenticating and getting an access token using client cred and auth grant flow.
Before we go too far into the design and poc etc, wanted to know if there is a quota or rate limit which could be impactful ?
I understand every public API have some form of rate limit or quota to prevent abuse and DDoS. However I couldnt find what the rate limit/quota is in any Azure doc.
If there is a limit, is that per client IP or app registration or per tenant ....etc?

We are running Azure AD premium P2 license