What is the frequency of WMAD?
CREATE TABLE table_54868 (
    "Call Letters" text,
    "Market" text,
    "Frequency" text,
    "AOR Years" text,
    "Current Format" text
)
SELECT "Frequency" FROM table_54868 WHERE "Call Letters" = 'wmad'
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 frequency of WMAD? ### Input: CREATE TABLE table_54868 (
    "Call Letters" text,
    "Market" text,
    "Frequency" text,
    "AOR Years" text,
    "Current Format" text
) ### Response: SELECT "Frequency" FROM table_54868 WHERE "Call Letters" = 'wmad'