SN4 ""

No	Pattern	Freq
1	[n mass] at the [noun sg]	592
2	staff at the [noun]	237
3	people at the [noun]	198
4	[n mass] at the [noun prp]	118
5	[n mass] at the end	52
6	[n mass] at the end	52
7	[n mass] at the [noun pl]	46
8	[n mass] at the time	40
9	[n mass] at the time	39
10	[n mass] at the top	26
11	[n mass] at the top	25
12	[n mass] at the moment	22
13	[n mass] at the moment	22
14	[n mass] at the beginning	19
15	[n mass] at the beginning	19
16	[n mass] at the centre	18
17	[n mass] at the centre	18
18	works at the [noun]	17
19	[n mass] at the bottom	15
20	[n mass] at the bottom	15
21	[n mass] at the hospital	13
22	sales at the [noun]	13
23	aircraft at the [noun]	13
24	[n mass] at the hospital	13
25	[n mass] at the school	12
26	[n mass] at the school	12
27	data at the [noun]	11
28	[n mass] at the withers	11
29	[n mass] at the withers	11
30	[n mass] at the base	9