SN4 ""

No	Pattern	Freq
1	at [adv] four [noun]	194
2	at least four [noun]	181
3	at [adv] four [noun pl]	177
4	at [adv] four time	24
5	at [adv] four times	23
6	at [adv] four week	20
7	at [adv] four weeks	20
8	at [adv] four year	19
9	at [adv] four years	18
10	at [adv] four hours	10
11	at [adv] four hour	10
12	at [adv] four [noun sg]	9
13	at [adv] four [n mass]	7
14	at [adv] four months	6
15	at [adv] four people	6
16	at [adv] four people	6
17	at [adv] four month	6
18	at [adv] four day	5
19	at [adv] four days	5