Hi Connor, in the administration interface, you can schedule a specific email issue to be sent in the future date, as is described on this page: Sending marketing emails.
If you want to automate this and send the "same" email every two weeks, you'll need to create a custom scheduled task and send the email programmatically in code of your scheduled task. In the Scheduled tasks application, you can then configure your task to start every two weeks.
There are also other possible ways for automating this process (for example via Marketing automation application), but this should work for your case.