how many years did the greek league have a finalist ?
CREATE TABLE table_203_391 (
    id number,
    "season" text,
    "greek league" text,
    "greek cup" text,
    "europe" text,
    "coach" text,
    "roster" text
)
SELECT COUNT("season") FROM table_203_391 WHERE "greek league" = 'finalist'
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: how many years did the greek league have a finalist ? ### Input: CREATE TABLE table_203_391 (
    id number,
    "season" text,
    "greek league" text,
    "greek cup" text,
    "europe" text,
    "coach" text,
    "roster" text
) ### Response: SELECT COUNT("season") FROM table_203_391 WHERE "greek league" = 'finalist'