CREATE TABLE table_30852 ("Series" FLOAT, "Premiere" TEXT, "Finale" TEXT, "Runners-up" TEXT, "Winner" TEXT)

How many runners-up were there when Joanne Wheatley won?
SELECT COUNT("Runners-up") FROM table_30852 WHERE "Winner" = 'Joanne Wheatley'
SELECT COUNT("Runners-up") FROM "table_30852" WHERE "Winner" = 'Joanne Wheatley'