Can I create timeline markers or ranges

I’ve recently learned I can export small amounts of my project using the “Copy Timeline to Source” feature. This has really helped me and I’m now wondering if I can create markers or ranges. Ideally, I’d like to be able to “spot check” various areas of my project as I work. My ideal work flow would look something like this:

  1. Define markers throughout my timeline at some regular interval (maybe 15 seconds)
  2. Click between 2 markers and somehow this is set as the export range
  3. Export

I realize some of what I’ve suggested may not be available but I’m wondering how much is and/or what methods other people might use to accomplish the same thing?