SN4 ""

No	Pattern	Freq
1	at an [adj]	2107
2	at an early	623
3	at an early	482
4	at an [adj -er]	148
5	at an earlier	141
6	at an annual	96
7	at an annual	96
8	at an average	72
9	at an average	72
10	at an additional	56
11	at an additional	56
12	at an appropriate	55
13	at an appropriate	55
14	at an alarming	48
15	at an alarming	48
16	at an extraordinary	47
17	at an extraordinary	47
18	at an international	41
19	at an international	41
20	at an estimated	40
21	at an estimated	40
22	at an old	33
23	at an open	32
24	at an open	32
25	at an all-time	28
26	at an advanced	28
27	at an old	28
28	at an all-time	28
29	at an advanced	28
30	at an initial	25