SN4 ""

No	Pattern	Freq
1	[noun sg] at a [adj] [noun sg]	1819
2	[noun sg] at a [adj] [noun sg]	1533
3	[noun sg] at a [adj -er] [noun sg]	268
4	[noun sg] at a late [noun sg]	164
5	[noun sg] at a later [noun sg]	148
6	[noun sg] at a [adj] level	137
7	[noun sg] at a [adj] time	117
8	[noun sg] at a [adj] date	109
9	[noun sg] at a particular [noun sg]	102
10	[noun sg] at a particular [noun sg]	102
11	[noun sg] at a [adj] rate	91
12	[noun sg] at a [adj] stage	81
13	[noun sg] at a [adj] price	80
14	[noun sg] at a local [noun sg]	70
15	[noun sg] at a local [noun sg]	70
16	[noun sg] at a low [noun sg]	64
17	[noun sg] at a high [noun sg]	61
18	[noun sg] at a given [noun sg]	52
19	[noun sg] at a given [noun sg]	52
20	[noun sg] at a [adj] meeting	49
21	[noun sg] at a [adj] point	48
22	[noun sg] at a [adj] angle	45
23	[noun sg] at a lower [noun sg]	42
24	[noun sg] at a special [noun sg]	41
25	[noun sg] at a special [noun sg]	41
26	place at a [adj] [noun sg]	39
27	[noun sg] at a [adj] pace	37
28	[noun sg] at a certain [noun sg]	34
29	[noun sg] at a higher [noun sg]	34
30	[noun sg] at a certain [noun sg]	34