SN4 ""

No	Pattern	Freq
1	at the [det] [noun] [prep]	387
2	at the [det] [noun sg] [prep]	372
3	at the same [noun] [prep]	356
4	at the [det] time [prep]	170
5	at the [det] time [prep]	170
6	at the [det] [noun] in	99
7	at the [det] [noun] in	99
8	at the [det] [noun] of	87
9	at the [det] [noun] of	87
10	at the [det] [noun] for	35
11	at the [det] [noun] for	35
12	at the [det] [noun] on	33
13	at the [det] [noun] on	33
14	at the [det] level [prep]	24
15	at the [det] level [prep]	24
16	at the [det] point [prep]	18
17	at the [det] point [prep]	18
18	at the [det] [noun] to	16
19	at the [det] [noun] by	16
20	at the [det] [noun] to	16
21	at the [det] rate [prep]	16
22	at the [det] [noun] by	16
23	at the [det] [noun] with	16
24	at the [det] [noun] from	16
25	at the [det] [noun] from	16
26	at the [det] [noun] with	16
27	at the [det] stage [prep]	15
28	at the [det] rate [prep]	15
29	at the [det] [noun] at	15
30	at the [det] [noun] at	15