SN4 ""

No	Pattern	Freq
1	[verb] at a [noun]	4020
2	[verb] at a [noun sg]	3830
3	[vb pp] at a [noun]	1445
4	[v-ing] at a [noun]	888
5	[vb past] at a [noun]	628
6	look at a [noun]	414
7	[verb] at a time	345
8	[verb] at a time	345
9	[to-vb] at a [noun]	324
10	[vb base] at a [noun]	271
11	[vb infin] at a [noun]	238
12	[vb -s] at a [noun]	226
13	looking at a [noun]	174
14	[verb] at a rate	172
15	[verb] at a rate	172
16	arrive at a [noun]	165
17	[verb] at a meeting	165
18	[verb] at a meeting	165
19	sit at a [noun]	140
20	come at a [noun]	113
21	[verb] at a table	113
22	[verb] at a table	113
23	[verb] at a [noun prp]	102
24	speak at a [noun]	94
25	[verb] at a cost	81
26	sitting at a [noun]	81
27	[verb] at a cost	81
28	[verb] at a distance	79
29	[verb] at a distance	79
30	speaking at a [noun]	70