CREATE TABLE table_30120566_1 (area__acres__ VARCHAR, townland VARCHAR)

How many different sizes (in acres) are noted for Rathcoola East?
SELECT COUNT(area__acres__) FROM table_30120566_1 WHERE townland = "Rathcoola East"
SELECT COUNT("area__acres__") FROM "table_30120566_1" WHERE "Rathcoola East" = "townland"