pie chart based upon frequency of measure

[cpv]

I would like to create a pie graph that shows the frequency of the number of times a customer has bought, e.g. how many bought 1 time, how many bought 2 times, etc.

The raw information looks like this:

The total orders is a calculated measure:
Customer Total Orders = CALCULATE(DISTINCTCOUNT('Document Attributes'[Document Transaction Number]),'Document Attributes'[Document Type] = "Invoice"||'Document Attributes'[Document Type] = "Sales Receipt")

Customer names come from a related dimension

It would seem that the calculated measure needs some sort of legend to exist in the pie chart (because it only shows the total number), but I am at a loss here.

 

[cpv]

I found the answer to my own solution, and wanted to post:

Create a new table by clicking "New Table" under Modeling on Home page and use the formula below.

Customer Order Frequency = SUMMARIZE (Customer, Customer[Customer Name], "Total Orders", CALCULATE ( DISTINCTCOUNT ( 'Document Attributes'[Document Transaction Number] ), 'Document Attributes'[Document Type] = "Invoice" || 'Document Attributes'[Document Type] = "Sales Receipt" ) )

This creates a new table with two columns.

Then Create a pie chart, select the [Total Orders] as Legend, the count(Customer Order Frequency[Customer Name]) as Values level. voila!