Out of interest how long does it take to implement a template website? I guess this is a 'how long is a piece of sting' but assume standard small business broch

Out of interest how long does it take to implement a template website? I guess this is a 'how long is a piece of sting' but assume standard small business brochure and/or eCommerce website and a client that knows what they want and organizes content upfront so not huge amounts of revisions. I ask as I have paid for a few websites at complete project rate and I'm curious the workload involved.