Their opening, fittings and airflow arrangements differ, so the same phrase can describe different physical situations. A top rim on a chest freezer is not an upright drawer outlet.
What the observation tells you
The distinction helps select the right manual and ask relevant questions. It does not establish which format is faulty or promise that every version has the same defrost method. A photograph of the exterior can help when the model is unclear.
A useful next step
Give the full model and describe the actual frost location. Keep maintenance limited to that model's owner instructions instead of borrowing a procedure from a different freezer format.
Manuals and supporting guidance
Model-specific instructions take priority. These references support the practical principles discussed here; they do not diagnose your appliance.