SN4 ""

No	Pattern	Freq
1	at which [adj]	173
2	at which [det]	152
3	at which this	40
4	at which this	40
5	at which [num]	28
6	at which all	18
7	at which these	18
8	at which all	18
9	at which these	18
10	at which new	12
11	at which some	12
12	at which some	12
13	at which new	12
14	at which each	9
15	at which one	9
16	at which each	9
17	at which one	9
18	at which such	8
19	at which any	8
20	at which two	8
21	at which two	8
22	at which any	8
23	at which such	8
24	at which both	7
25	at which both	7
26	at which that	7
27	at which that	7
28	at which many	6
29	at which marginal	6
30	at which marginal	6