It depends on your project! The time it takes to cut your project depends on the material you are cutting, the router bit size, and the overall size of your design. The softer the material, the deeper you can cut in a single pass, and the quicker you can cut. The larger your project, the longer it will take.
As an example, with our M2, you can cut Santa's sleigh on pine plywood with a 1/4 inch upcut bit in about four hours. https://makermade.com/product/santas-sleigh/