I'm really not sure what you mean by enough time.
By time they are not more known as your number.
By the time they're 15 or 16, most have gone out as a couple.
His parents had both died by the time he was 10 years old.
By the time he decided what to say, everyone was in the car.
He would have left, by the time I began training.
BY the time he left we still weren't ready, which makes no sense at all.
The school system was already much better by the time you came along.
By the time I said sure, she was already gone.
He was already out of the office by the time I came in.