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_52 (frequency__mhz_ VARCHAR, type VARCHAR, call_letters VARCHAR)
### Question:
Frequency (MHz) that has a Type of primary, and a Call letters of ktbb-fm has what total number?
### Answer:
SELECT COUNT(frequency__mhz_) FROM table_name_52 WHERE type = "primary" AND call_letters = "ktbb-fm"