SN4 ""

No	Pattern	Freq
1	[coord] [noun] at the [noun]	887
2	[conj] [noun] at the [noun sg]	833
3	and [noun] at the [noun]	792
4	and [noun] at the [noun]	792
5	[conj] [noun sg] at the [noun]	484
6	[conj] [noun pl] at the [noun]	388
7	[conj] [noun] at the [noun prp]	142
8	[conj] [noun prp] at the [noun]	123
9	[subord] [noun] at the [noun]	94
10	[conj] [noun] at the time	71
11	[conj] [noun] at the time	70
12	[conj] [noun] at the end	68
13	[conj] [noun] at the end	67
14	or [noun] at the [noun]	64
15	or [noun] at the [noun]	64
16	[conj] [noun] at the [noun pl]	57
17	that [noun] at the [noun]	52
18	that [noun] at the [noun]	52
19	[that] [noun] at the [noun]	52
20	[conj] [noun] at the university	41
21	[conj] [noun] at the university	40
22	as [noun] at the [noun]	35
23	as [noun] at the [noun]	35
24	[conj] [noun] at the top	33
25	[conj] [n mass] at the [noun]	33
26	[conj] [noun] at the top	33
27	[conj] [noun] at the moment	22
28	[conj] [noun] at the moment	22
29	[conj] staff at the [noun]	20
30	but [noun] at the [noun]	20