What is the total number of Week, when Opponent is At Cleveland Browns?
CREATE TABLE table_name_15 (
    week VARCHAR,
    opponent VARCHAR
)
SELECT COUNT(week) FROM table_name_15 WHERE opponent = "at cleveland browns"
Below are sql tables schemas paired with instruction that describes a task. Using valid SQLite, write a response that appropriately completes the request for the provided tables. ### Instruction: What is the total number of Week, when Opponent is At Cleveland Browns? ### Input: CREATE TABLE table_name_15 (
    week VARCHAR,
    opponent VARCHAR
) ### Response: SELECT COUNT(week) FROM table_name_15 WHERE opponent = "at cleveland browns"