SN4 ""

No	Pattern	Freq
1	been at [noun sg]	243
2	been at [noun prp]	130
3	been at [noun pl]	63
4	been at work	49
5	been at work	49
6	been at home	43
7	been at home	43
8	been at school	35
9	been at school	35
10	been at pains	33
11	been at pain	33
12	been at war	17
13	been at war	17
14	been at loggerheads	10
15	been at loggerhead	10
16	been at risk	10
17	been at risk	10
18	been at oxford	8
19	been at oxford	8
20	been at odds	7
21	been at odds	7
22	been at university	6
23	been at college	6
24	been at college	6
25	been at stake	6
26	been at stake	6
27	been at university	5
28	been at sea	5
29	been at eton	5
30	been at sea	5