How to avoid exceeding the validation rate limit

Hi

When testing a python-based HTML editing tool that uses the HTTP "include
file as body of POST" interface, I inadvertently exceeded the limit on how
many validation checks are permitted in a certain time frame. Is there any
information about what those limits are, please, or how long the "cool
down" period is afterward? Using the editor under normal circumstances, a
validation check might be requested 3 or 4 times in a day, and it was only
the coding & testing process that exceeded this.

Many thanks
Nigel