CREATE TABLE table_20890 ("Archbishop" TEXT, "Born" TEXT, "Ordained Priest" TEXT, "Ordained Bishop" TEXT, "Appointed Archbishop" TEXT, "Vacated throne" TEXT, "Died" TEXT)

How many appointed archbishops were ordained as priests on December 20, 1959
SELECT COUNT("Appointed Archbishop") FROM table_20890 WHERE "Ordained Priest" = 'December 20, 1959'
SELECT COUNT("Appointed Archbishop") FROM "table_20890" WHERE "Ordained Priest" = 'December 20, 1959'