CREATE TABLE table_57932 ("Club/Team" TEXT, "League" TEXT, "Venue" TEXT, "Established" FLOAT, "Premierships" TEXT)

How many premierships for the commonwealth bank trophy league?
SELECT "Premierships" FROM table_57932 WHERE "League" = 'commonwealth bank trophy'
SELECT "Premierships" FROM "table_57932" WHERE "League" = 'commonwealth bank trophy'