What happened to the frequency feature in referencing a dataset?

I’ve just realised that referencing a dataset with a frequency column no longer samples proportionally to the frequency, I used to love this feature! Has this gone completely or have I missed a ‘new’ way of doing it?

The only way I can think of replicating this feature is by creating a dataset where the values in the column I’m wanting to reference are repeated to mimic the frequency, i.e. what would have been
Country | Frequency
United Kingdom | 5
Australia | 3
United States | 1

is now
Country
United Kingdom
United Kingdom
United Kingdom
United Kingdom
United Kingdom
Australia
Australia
Australia
United States

is there a better way of doing this?