CREATE TABLE table_31751 ("Week" FLOAT, "Date" TEXT, "Opponent" TEXT, "Result" TEXT, "Venue" TEXT, "Start Time" TEXT, "Attendance" TEXT)

Tell me the number of weeks for december 5, 2005
SELECT COUNT("Week") FROM table_31751 WHERE "Date" = 'december 5, 2005'
SELECT COUNT("Week") FROM "table_31751" WHERE "Date" = 'december 5, 2005'