Actually, term life is temporary coverage for a specific number of years.
You can lock-in your premium so it stays the same for the entire duration of your term life insurance policy.
Since you have several options for your term, you can select the period of time your premium remans the same, from 10, 15, 20 or 30 years.
The longer your term, the higher your annual premium will be.
If you need continued life insurance when your term life policy expires, you may renew your policy but the new premium will be higher based on your age at the time you renew your policy.
Here's how you can compare term life insurance premiums.