Say you have a field, Fruit, formatted with a custom value list of "apple", "Pear", "Peach".
If you add a "count of" summary field that counts any field in the table that is never empty--a primary or foreign key feld is often a good choice, it will count the total records in a given found set.
If you set up a list view layout and add a sub summary layout part, "when sorted by Fruit", you can place the Fruit field and the summary field in this newly added layout part.
Then, if you sort your records by the fruit field, you'll see the total records in your table with each of the three values.
And these summary field subtotals can be charted.
For more on summary reports, see: Creating Filemaker Pro summary reports--Tutorial
That's awesome, I knew it had to be somethng simple. Many thanks