SN4 ""

No	Pattern	Freq
1	[vb pp] at a [adj] [noun sg]	777
2	[v-ing] at a [adj] [noun sg]	376
3	[vb past] at a [adj] [noun sg]	245
4	[verb] at a [adj] level	190
5	[to-vb] at a [adj] [noun sg]	184
6	look at a [adj] [noun sg]	150
7	[vb base] at a [adj] [noun sg]	128
8	[vb -s] at a [adj] [noun sg]	128
9	[verb] at a [adj] rate	127
10	[vb infin] at a [adj] [noun sg]	102
11	arrive at a [adj] [noun sg]	96
12	[verb] at a [adj] pace	80
13	[verb] at a particular [noun sg]	80
14	[verb] at a [adj] time	79
15	[verb] at a high [noun sg]	71
16	looking at a [adj] [noun sg]	69
17	[verb] at a [adj] price	52
18	[verb] at a local [noun sg]	50
19	[verb] at a different [noun sg]	49
20	[verb] at a [adj] speed	46
21	aim at a [adj] [noun sg]	45
22	[verb] at a constant [noun sg]	44
23	[verb] at a [adj] meeting	42
24	sit at a [adj] [noun sg]	41
25	work at a [adj] [noun sg]	41
26	[verb] at a [adj] angle	40
27	[verb] at a [adj] distance	39
28	[verb] at a special [noun sg]	37
29	to arrive at a [adj] [noun sg]	37
30	[verb] at a small [noun sg]	36