How many years did Barclay Nordica Arrows BMW enter with Cosworth v8 engine?
CREATE TABLE "complete_formula_one_world_championship_" (
  "year" real,
  "entrant" text,
  "chassis" text,
  "engine" text,
  "points" real
);
SELECT SUM("year") FROM "complete_formula_one_world_championship_" WHERE "entrant"='barclay nordica arrows bmw' AND "engine"='cosworth v8';