CREATE TABLE table_70744 ("Year" FLOAT, "Entrant" CLOB, "Chassis" CLOB, "Engine" CLOB, "Points" FLOAT)

How many years did John Player Lotus used Cosworth v8?
SELECT SUM("Year") FROM table_70744 WHERE "Engine" = 'cosworth v8' AND "Entrant" = 'john player lotus'
SELECT SUM("Year") FROM "table_70744" WHERE "Engine" = 'cosworth v8' AND "Entrant" = 'john player lotus'