SN4 ""

No	Pattern	Freq
1	at a [adj] [noun sg]	7396
2	at a [adj] [noun sg]	6144
3	at a [adj -er] [noun sg]	1161
4	at a [adj] level	804
5	at a late [noun sg]	562
6	at a later [noun sg]	535
7	at a [adj] rate	433
8	at a [adj] time	380
9	at a [adj] date	374
10	at a high [noun sg]	308
11	at a [adj] stage	303
12	at a low [noun sg]	295
13	at a particular [noun sg]	254
14	at a particular [noun sg]	254
15	at a [adj] price	241
16	at a [adj] meeting	231
17	at a [adj] pace	207
18	at a local [noun sg]	202
19	at a local [noun sg]	202
20	at a lower [noun sg]	178
21	at a [adj] point	174
22	at a higher [noun sg]	173
23	at a certain [noun sg]	163
24	at a certain [noun sg]	163
25	at a special [noun sg]	153
26	at a special [noun sg]	153
27	at a high [noun sg]	135
28	at a given [noun sg]	133
29	at a given [noun sg]	133
30	at a [adj] angle	131