CREATE TABLE table_66938 ("Year" FLOAT, "Entrant" TEXT, "Chassis" TEXT, "Engine" TEXT, "Points" FLOAT)

How many points were earned with a Chassis of a Ferrari 156?
SELECT COUNT("Points") FROM table_66938 WHERE "Chassis" = 'ferrari 156'
SELECT COUNT("Points") FROM "table_66938" WHERE "Chassis" = 'ferrari 156'