And an internship program allowed qualified students to spend substantial amounts of time at local business or professional sites, including restaurants, hospitals, and law and architectural offices. (educationworld.com)
Sometimes, toxic side effects aren't discovered until fairly late in the drug development process, when substantial amounts of time and money have already been invested in clinical trials. (sciencedaily.com)
But all teacher training courses include substantial amounts of time for trainees based in schools. (bbc.co.uk)