CREATE TABLE table_17859 ("Club" TEXT, "Played" TEXT, "Won" TEXT, "Drawn" TEXT, "Lost" TEXT, "Points for" TEXT, "Points against" TEXT, "Tries for" TEXT, "Tries against" TEXT, "Try bonus" TEXT, "Losing bonus" TEXT, "Points" TEXT)

How many clubs have tries for count of 50?
SELECT COUNT("Played") FROM table_17859 WHERE "Tries for" = '50'
SELECT COUNT("Played") FROM "table_17859" WHERE "Tries for" = '50'