Face transplants are complicated procedures that usually require extensive preparation, typically months or years.

In reality, all of them undertook extensive preparation, blocking out time in their diaries to engage in role-plays or to cram key statistics.

To attend worship at one of the great cathedrals of sport requires extensive preparation and debriefing.

She was known for extensive preparation for oral arguments and for running a hot bench, where judges ask lawyers plenty of questions.

In this case, the procedure may require more extensive preparation and take more time to perform.