CREATE TABLE table_25615 ("date  ( dd.mm.yyyy ) " TEXT, "Tail number" TEXT, "Location" TEXT, "Fatalities" TEXT, "Brief description" TEXT)

How many different brief descriptions are there for crashes with 0/161 fatalities?
SELECT COUNT("Brief description") FROM table_25615 WHERE "Fatalities" = '0/161'
SELECT COUNT("Brief description") FROM "table_25615" WHERE "Fatalities" = '0/161'