Which season played the highest number of matches at M Chinnaswamy Stadium?
season refers to Season_Id; the highest number of matches refers to max(count(Season_Id)); M Chinnaswamy Stadium refers to Venue_Name = 'M Chinnaswamy Stadium'
SELECT T1.Season_Id FROM `Match` AS T1 INNER JOIN Venue AS T2 ON T1.Venue_Id = T2.Venue_Id WHERE T2.Venue_Name = 'M Chinnaswamy Stadium' GROUP BY T1.Season_Id ORDER BY COUNT(T1.Season_Id) DESC LIMIT 1