How many different years was the name/designation cetme?
CREATE TABLE table_26389588_1 (
    year_of_introduction VARCHAR,
    name___designation VARCHAR
)
SELECT COUNT(year_of_introduction) FROM table_26389588_1 WHERE name___designation = "CETME"
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 different years was the name/designation cetme? ### Input: CREATE TABLE table_26389588_1 (
    year_of_introduction VARCHAR,
    name___designation VARCHAR
) ### Response: SELECT COUNT(year_of_introduction) FROM table_26389588_1 WHERE name___designation = "CETME"