The phrase "finite period" means that something will only last for a specific amount of time and will eventually come to an end. It is not permanent or everlasting. Full definition
Rather than traveling for finite periods of time and then returning to «normal lives», they decided to make traveling a lifestyle, something truly sustainable. (southamericabackpacker.com)
What those placements had in common is that they were for finite periods. (theeducator.com)
Choose small, finite periods of time for your fitness goals that you know are doable and don't fill you with dread. (mindbodygreen.com)