Database: chicago_crime
Question: What is the average number of less severe crimes reported a day in February of 2018?
SQL: SELECT CAST(COUNT(T2.case_number) AS REAL) / 28 FROM IUCR AS T1 INNER JOIN Crime AS T2 ON T2.iucr_no = T1.iucr_no WHERE T2.date LIKE '2/%/2018%' AND T1.index_code = 'N'