Table: tv_schedule_14
Columns: time
show_name
local_networked
ad_freq
news_freq

Question: How often are there ads during American Top 40?
SQL: SELECT "ad_freq" FROM tv_schedule_14 WHERE "show_name" = 'american top 40'

Question: When does Classic Hits air?
SQL: SELECT "time" FROM tv_schedule_14 WHERE "show_name" = 'classic hits'