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_2226817_6 ( no_in_season VARCHAR, written_by VARCHAR )

### Question ###
How many season numbers are there for the episodes written by Art Everett?

### Accurate SQL ###

SELECT COUNT(no_in_season) FROM table_2226817_6 WHERE written_by = "Art Everett"