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_1137704_2 (date VARCHAR, grand_prix VARCHAR)
### Question:
what of the total number of date where grand prix is portuguese grand prix
### Answer:
SELECT COUNT(date) FROM table_1137704_2 WHERE grand_prix = "Portuguese grand_prix"