How many times did episode 6 originally air?
CREATE TABLE table_21550897_1 (original_air_date VARCHAR, _number VARCHAR)
SELECT COUNT(original_air_date) FROM table_21550897_1 WHERE _number = 6
### Context: CREATE TABLE table_21550897_1 (original_air_date VARCHAR, _number VARCHAR) ### Question: How many times did episode 6 originally air? ### Answer: SELECT COUNT(original_air_date) FROM table_21550897_1 WHERE _number = 6