SN4 ""

No	Pattern	Freq
1	at least three [noun]	426
2	at [adv] three [noun pl]	403
3	at [adv] three year	68
4	at [adv] three years	68
5	at [adv] three time	49
6	at [adv] three times	49
7	at [adv] three months	40
8	at [adv] three month	40
9	at [adv] three week	22
10	at [adv] three weeks	22
11	at [adv] three [noun sg]	21
12	at [adv] three [n mass]	17
13	at [adv] three people	16
14	at [adv] three people	16
15	at [adv] three days	11
16	at [adv] three day	11
17	at about three [noun]	8
18	at [adv] three quarters	7
19	at [adv] three reasons	7
20	at [adv] three reason	7
21	at [adv] three quarter	7
22	at [adv] three hour	7
23	at [adv] three hours	7
24	at [adv] three occasions	6
25	at [adv] three occasion	6
26	at [adv] three century	5
27	at [adv] three centuries	5
28	at [adv] three ways	5
29	at [adv] three others	5
30	at [adv] three other	5