SN4 ""

No	Pattern	Freq
1	[verb] at a [noun sg]	3830
2	[vb pp] at a [noun sg]	1355
3	[v-ing] at a [noun sg]	848
4	[vb past] at a [noun sg]	601
5	look at a [noun sg]	400
6	[verb] at a time	345
7	[to-vb] at a [noun sg]	314
8	[vb base] at a [noun sg]	259
9	[vb infin] at a [noun sg]	231
10	[vb -s] at a [noun sg]	222
11	[verb] at a rate	172
12	looking at a [noun sg]	169
13	[verb] at a meeting	165
14	arrive at a [noun sg]	154
15	sit at a [noun sg]	140
16	[verb] at a table	113
17	come at a [noun sg]	113
18	speak at a [noun sg]	84
19	sitting at a [noun sg]	81
20	[verb] at a cost	81
21	[verb] at a distance	79
22	work at a [noun sg]	67
23	stop at a [noun sg]	64
24	[verb] at a glance	64
25	speaking at a [noun sg]	62
26	[verb] at a press	61
27	[verb] at a number	60
28	[verb] at a loss	60
29	to look at a [noun sg]	59
30	look at a [noun sg]	59