CREATE TABLE table_28548 ("Round" TEXT, "Circuit" TEXT, "Date" TEXT, "Pole Position" TEXT, "Fastest Lap" TEXT, "Winning Driver" TEXT, "Winning Team" TEXT)

How many dates are there in round 3?
SELECT COUNT("Date") FROM table_28548 WHERE "Round" = '3'
SELECT COUNT("Date") FROM "table_28548" WHERE "Round" = '3'