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_2 (year VARCHAR, chassis VARCHAR)
### Question:
Name the total number of years for chassis of ensign n175
### Answer:
SELECT COUNT(year) FROM table_name_2 WHERE chassis = "ensign n175"