SN4 ""

No	Pattern	Freq
1	[noun] at a [noun]	6271
2	[noun] at a [noun sg]	5794
3	[noun] at a [noun]	5783
4	[noun sg] at a [noun]	4051
5	[noun pl] at a [noun]	1714
6	[noun] at a time	1497
7	[noun] at a time	1497
8	[noun] at an [noun]	488
9	[noun prp] at a [noun]	349
10	[noun] at a [noun prp]	341
11	[noun] at a cost	217
12	[noun] at a cost	217
13	[noun] at a meeting	186
14	[noun] at a meeting	186
15	[n mass] at a [noun]	139
16	[noun] at a rate	137
17	[noun] at a rate	137
18	[noun] at a distance	113
19	[noun] at a distance	113
20	[noun] at a price	96
21	[noun] at a price	96
22	[noun] at a [noun pl]	87
23	week at a [noun]	84
24	day at a [noun]	81
25	[noun] at a house	80
26	[noun] at a house	80
27	hour at a [noun]	74
28	[noun] at a level	71
29	[noun] at a level	71
30	attempt at a [noun]	71