You could try use a placed order to add the latest Placed Order date as a Profile property, you will need to create a Flow that creates the custom property and assigns it to a Profile whenever they place an order. Whenever the Profile places an order, the custom property value will update with the latest Placed Order date.
Then once this property has been assigned to a Profile, you will also be able to property to create Date-Triggered Flows. More details on these Flows can be found here.
You could try use a placed order to add the latest Placed Order date as a Profile property, you will need to create a Flow that creates the custom property and assigns it to a Profile whenever they place an order. Whenever the Profile places an order, the custom property value will update with the latest Placed Order date.
Then once this property has been assigned to a Profile, you will also be able to property to create Date-Triggered Flows. More details on these Flows can be found here.
With the incremental update how did you plan to use it or where do you plan on using it for?
I could imagine create a flow with different splits that add a tag for each quantity of total orders. But keep in mind if you'd want to also factor in cancellations or refunds.