How long after replacing throttle body does it take for monitor to be ready?

Question

We drive it 80 miles but when we took it to get smogged it said obd2 monitors not ready.

Answer 1

it should not take that long, I would try to drive 15 miles on the highway at 60 mph and 10-15 miles regular city driving.

That usually does it for us, unless there is a problem why the monitors are not completing.

which system is not completing?