SN4 ""

No	Pattern	Freq
1	[noun sg] at a [adj]	2266
2	[noun sg] at a [adj]	2121
3	[noun sg] at an [adj]	546
4	[noun sg] at a [adj -er]	316
5	[noun sg] at a late	165
6	[noun sg] at a early	149
7	[noun sg] at a later	149
8	[noun sg] at a early	114
9	[noun sg] at a particular	103
10	[noun sg] at a particular	103
11	[noun sg] at a local	78
12	[noun sg] at a local	78
13	[noun sg] at a low	68
14	[noun sg] at a high	65
15	[noun sg] at a given	54
16	[noun sg] at a given	54
17	place at a [adj]	54
18	[noun sg] at a special	46
19	[noun sg] at a special	46
20	[noun sg] at a lower	44
21	[noun sg] at a [num]	41
22	[noun sg] at a higher	37
23	attempt at a [adj]	36
24	[noun sg] at a constant	36
25	[noun sg] at a constant	36
26	[noun sg] at a certain	35
27	[noun sg] at a earlier	35
28	[noun sg] at a certain	35
29	look at a [adj]	34
30	[noun sg] at a future	28