SN4 ""

No	Pattern	Freq
1	at [det] [noun]	24438
2	at [det] [noun sg]	20645
3	at this [noun]	8171
4	at [det] time	7156
5	at [det] time	6299
6	at that [noun]	5194
7	at [det] [noun pl]	3550
8	at any [noun]	3325
9	at [det] stage	2959
10	at [det] stage	2840
11	at [det] point	2597
12	at [det] point	2492
13	at all [noun]	2045
14	at some [noun]	1806
15	at each [noun]	1698
16	at [det] moment	1302
17	at [det] moment	1267
18	at [det] level	1148
19	at [det] times	857
20	at [det] rate	785
21	at [det] rate	782
22	at [det] other	682
23	at [det] other	672
24	at [det] level	592
25	at [det] end	567
26	at [det] levels	556
27	at these [noun]	447
28	at [det] end	431
29	at such [noun]	298
30	at [det] cost	289