There is certainly merit in releasing at least 3 parts on the debut - that gets the reader far enough into the story to get invested. But, five chapters per week creates problems you might not be aware of.
So, take a look at mine: https://tapas.io/series/ReApotheosis/info
What you're going to see as of episode 11 there are the occasional chapters that were long enough to need to be divided into two parts. And, without exception, there is a drop-off of views from one part to the other. The worst was the first, where I didn't realize that when you posted the chapter onto social media you really need to post links to both parts, but even after that there is always a drop-off.
It is always going to be harder to get people to read the second "episode" in a day than it is to get them to read the first. And, all things being equal, this trend can be expected to continue. So, you will get far more total views per chapter over time if they are released one per week than if you release multiple in a day.
