Below is the list of tables from the database along with their columns and datatype. Need to generate an accurate SQL query for the question.
Only use the columns present in the respective table. Only use the columns which are required to generate the SQL query. Only use table joins if required and not otherwise.

### Tables ###
TABLE: CREATE TABLE table_name_39 ( episodes VARCHAR, tv_station VARCHAR, average_ratings VARCHAR )

### Question ###
What is the episode on NHK with average ratings of 9.2%?

### Accurate SQL ###

SELECT COUNT(episodes) FROM table_name_39 WHERE tv_station = "nhk" AND average_ratings = "9.2%"