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_1231316_5 (fastest_time__s_ VARCHAR, nation VARCHAR)
### Question:
Nigeria had the fastest time once.
### Answer:
SELECT COUNT(fastest_time__s_) FROM table_1231316_5 WHERE nation = "Nigeria"