SN4 ""

No	Pattern	Freq
1	at [noun] for	1470
2	at [noun sg] for	536
3	at [noun prp] for	452
4	at [n mass] for	383
5	at home for	101
6	at home for	101
7	at [noun pl] for	99
8	at 37°c for	42
9	at 37°c for	42
10	at school for	33
11	at school for	32
12	at work for	26
13	at work for	26
14	at 4°c for	21
15	at 4°c for	21
16	at night for	20
17	at risk for	20
18	at risk for	20
19	at night for	19
20	at present for	16
21	at present for	16
22	at hand for	14
23	at hand for	14
24	at fault for	13
25	at stake for	13
26	at sea for	13
27	at sea for	13
28	at stake for	13
29	at fault for	13
30	at auction for	12