SELECT count(*) FROM files WHERE duration LIKE "4:%"
How many songs have 4 minute duration?
[Schema (values) (types)]: | music_1 |  genre : g_name (text) , rating (text) , most_popular_in (text) | artist : artist_name (text) , country (text) , gender (text) , preferred_genre (text) | files : f_id (text) , artist_name (text) , file_size (text) , duration (text) , formats (text) | song : song_name (text) , artist_name (text) , country (text) , f_id (text) , genre_is (text) , rating (text) , languages (text) , releasedate (text) , resolution (number);