About the same amount of time as any other fence. The installation time depends on factors like the size of your property, ground conditions, weather, availability of materials, accuracy, and planning.
For louvered fences, having the distance between posts be the same as the slat material you purchase saves time. So does having the posts be level.
If you hire a contractor, their specific fence company's schedule. Your installer can give you an accurate timeline based on your property's requirements.