Below is an context that describes a sql query, paired with an question that provides further information. Write an answer that appropriately completes the request.  # noqa: E501
### Context:
CREATE TABLE table_name_79 (year VARCHAR, chassis VARCHAR)
### Question:
how many times is the chassis brabham bt33?
### Answer:
SELECT COUNT(year) FROM table_name_79 WHERE chassis = "brabham bt33"