How many weeks have September 14, 2008 as the date?
CREATE TABLE "regular_season" (
  "week" real,
  "date" text,
  "time_pt" text,
  "opponent" text,
  "result" text,
  "record" text,
  "game_site" text
);
SELECT SUM("week") FROM "regular_season" WHERE "date"='september 14, 2008';