CREATE TABLE table_21275 ("Team" TEXT, "Outgoing manager" TEXT, "Manner of departure" TEXT, "Date of vacancy" TEXT, "Replaced by" TEXT, "Date of appointment" TEXT)

How many appointment dates were recorded when J rgen Kohler was the replaced by?
SELECT COUNT("Date of appointment") FROM table_21275 WHERE "Replaced by" = 'Jürgen Kohler'
SELECT COUNT("Date of appointment") FROM "table_21275" WHERE "Replaced by" = 'Jürgen Kohler'