Each Phantombuster account has a daily amount of execution time, depending on its subscription.
You can find more details about your execution time on your Resources page.
Your time resets every day at midnight (in your time zone), and does not stack over time.
Want to see how much time you have left for today? Just hover over your execution time counter at the top right of your account:
If you click here, you will be taken to your resources page where you can see information on all of your resources, including when your execution time will reset:
NB: Your execution time counter will not reset in under 24 hours, even if you change the time zone of your account.