Is there a "secret" code among coders to not offer any help???

[Gribouillis]

Concerning your questions, I didn't answer because I couldn't. I don't use Thonny nor pyautogui nor pulover and I don't know if the schedule module can go down to milliseconds. I guess the answer is in the schedule module's documentation. From my experience, one can schedule events very precisely, at least in linux, by using the threading module's lock and condition objects with timeout.

The main reason could be the thousands of library that exist for python, and nobody can be an expert in all these libraries.