CREATE TABLE table_16638 ("Rd." FLOAT, "Grand Prix" CLOB, "Pole Position" CLOB, "Fastest Lap" CLOB, "Winning Driver" CLOB, "Constructor" CLOB, "Report" CLOB)

How many on the list are called the Austrian Grand Prix?
SELECT COUNT("Rd.") FROM table_16638 WHERE "Grand Prix" = 'Austrian Grand Prix'
SELECT COUNT("Rd.") FROM "table_16638" WHERE "Grand Prix" = 'Austrian Grand Prix'