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_18536769_1 (format VARCHAR, frequency VARCHAR)
### Question:
When fm 97.3 is the frequency how many formats are there?
### Answer:
SELECT COUNT(format) FROM table_18536769_1 WHERE frequency = "FM 97.3"