CREATE TABLE table_204_596 (id DECIMAL, "year" DECIMAL, "winners" TEXT, "score" TEXT, "runners up" TEXT, "notes" TEXT)

which team came in as runners up the most often between 1950 and 1960
SELECT "runners up" FROM table_204_596 WHERE "year" >= 1950 AND "year" <= 1960 GROUP BY "runners up" ORDER BY COUNT(*) DESC LIMIT 1
SELECT "runners up" FROM "table_204_596" WHERE "year" <= 1960 AND "year" >= 1950 GROUP BY "runners up" ORDER BY COUNT(*) DESC NULLS LAST LIMIT 1