CREATE TABLE weekly_weather (station_id NUMBER, day_of_week CLOB, high_temperature NUMBER, low_temperature NUMBER, precipitation FLOAT, wind_speed_mph NUMBER)
CREATE TABLE route (train_id NUMBER, station_id NUMBER)
CREATE TABLE train (id NUMBER, train_number NUMBER, name CLOB, origin CLOB, destination CLOB, time CLOB, interval CLOB)
CREATE TABLE station (id NUMBER, network_name CLOB, services CLOB, local_authority CLOB)

Find times of trains that run through stations for the local authority Chiltern, compare the total number of different times.
SELECT time, COUNT(time) FROM station AS t1 JOIN route AS t2 ON t1.id = t2.station_id JOIN train AS t3 ON t2.train_id = t3.id WHERE t1.local_authority = "Chiltern" GROUP BY time
SELECT "time", COUNT("time") FROM "station" "t1" JOIN "route" "t2" ON "t1"."id" = "t2"."station_id" JOIN "train" "t3" ON "t2"."train_id" = "t3"."id" WHERE "Chiltern" = "t1"."local_authority" GROUP BY "time"