CREATE TABLE table_73937 ("Round" FLOAT, "Race" FLOAT, "Circuit" TEXT, "Date" TEXT, "Pole Position" TEXT, "Fastest Lap" TEXT, "Winning driver" TEXT, "Winning team" TEXT)

In how many rounds was Race 17?
SELECT COUNT("Round") FROM table_73937 WHERE "Race" = '17'
SELECT COUNT("Round") FROM "table_73937" WHERE "Race" = '17'