CREATE TABLE table_18040 ("Week" FLOAT, "Date" TEXT, "Opponent" TEXT, "Result" TEXT, "Game site" TEXT, "Record" TEXT, "Attendance" FLOAT)

How many times did the team play at oakland-alameda county coliseum?
SELECT COUNT("Date") FROM table_18040 WHERE "Game site" = 'Oakland-Alameda County Coliseum'
SELECT COUNT("Date") FROM "table_18040" WHERE "Game site" = 'Oakland-Alameda County Coliseum'