SN4 ""

No	Pattern	Freq
1	[noun] [verb] at a [noun sg]	833
2	[noun] [verb] at a [noun]	796
3	[noun sg] [verb] at a [noun]	494
4	[noun pl] [verb] at a [noun]	233
5	[noun] [vb past] at a [noun]	227
6	[noun] [vb pp] at a [noun]	225
7	[noun prp] [verb] at a [noun]	135
8	[noun] [v-ing] at a [noun]	133
9	[noun] [vb -s] at a [noun]	132
10	[noun] [verb] at a time	98
11	[noun] [verb] at a time	98
12	[noun] [to-vb] at a [noun]	91
13	[noun] [verb] at an [noun]	87
14	[noun] [vb base] at a [noun]	71
15	[noun] come at a [noun]	67
16	[noun] look at a [noun]	54
17	[noun] [verb] at a rate	39
18	[noun] [verb] at a rate	39
19	[noun] arrive at a [noun]	39
20	[noun] [verb] at a [noun prp]	38
21	[noun] comes at a [noun]	33
22	[noun] sit at a [noun]	29
23	[noun] came at a [noun]	28
24	[noun] [verb] at a table	27
25	[noun] [verb] at a table	27
26	[noun] [verb] at a meeting	25
27	[noun] occur at a [noun]	25
28	[noun] [verb] at a meeting	25
29	[noun] [verb] at a angle	22
30	[noun] [verb] at a angle	22