In cell H$2,$ get the unique Area values using UNIQUE$().$

In column I, use COUNTIF$()$ to get the count of each Area. Pass the data range from A$2$ to A$45$ as absolute addresses, and the filter criteria from H$2$ to H$9.$

In column J$,$ use COUNTIFS$()$ to get the count of each area with more than $20$ Swallow$-$tails. the first two arguments are the same as the previous step, then add a condition for column D to be greater than $20.$