SN4 ""

No	Pattern	Freq
1	[noun] [noun pl] at the [noun]	1324
2	[noun sg] [noun pl] at the [noun]	1122
3	[noun] [noun pl] at the [noun sg]	1045
4	[noun] [noun pl] at the [noun prp]	195
5	[noun] [noun pl] at the end	118
6	[noun] [noun pl] at the end	114
7	[noun prp] [noun pl] at the [noun]	114
8	[noun] [noun pl] at the time	79
9	[noun] [noun pl] at the time	78
10	[noun] [noun pl] at the [noun pl]	78
11	[noun pl] [noun pl] at the [noun]	57
12	[noun] [noun pl] at the university	44
13	[noun] [noun pl] at the university	41
14	[noun] [noun pl] at the moment	40
15	[noun] [noun pl] at the moment	40
16	[noun] [noun pl] at the beginning	29
17	[noun] [noun pl] at the beginning	29
18	[noun] services at the [noun]	26
19	[noun] [noun pl] at the expense	23
20	[noun] [noun pl] at the back	23
21	[n mass] [noun pl] at the [noun]	23
22	[noun] [noun pl] at the back	23
23	[noun] [noun pl] at the expense	23
24	[noun] [noun pl] at the top	21
25	[noun] [noun pl] at the top	21
26	[noun] workers at the [noun]	20
27	[noun] [noun pl] at the start	18
28	[noun] [noun pl] at the start	18
29	[noun] levels at the [noun]	17
30	security [noun pl] at the [noun]	16