CREATE TABLE table_70335 ("Race" FLOAT, "Circuit" TEXT, "Location / State" TEXT, "Date" TEXT, "Winner" TEXT, "Team" TEXT)

How many races were in the Mallala Motor Sport Park circuit?
SELECT COUNT("Race") FROM table_70335 WHERE "Circuit" = 'mallala motor sport park'
SELECT COUNT("Race") FROM "table_70335" WHERE "Circuit" = 'mallala motor sport park'