SN4 ""

No	Pattern	Freq
1	[prep] [noun sg] at a [noun]	354
2	[prep] [noun sg] at a [noun sg]	332
3	of [noun sg] at a [noun]	141
4	of [noun sg] at a [noun]	141
5	[prep] [noun sg] at a time	75
6	[prep] [noun sg] at a time	75
7	in [noun sg] at a [noun]	55
8	in [noun sg] at a [noun]	55
9	for [noun sg] at a [noun]	34
10	for [noun sg] at a [noun]	34
11	to [noun sg] at a [noun]	32
12	to [noun sg] at a [noun]	32
13	on [noun sg] at a [noun]	22
14	on [noun sg] at a [noun]	22
15	[prep] [noun sg] at a meeting	19
16	[prep] [noun sg] at a meeting	19
17	with [noun sg] at a [noun]	15
18	with [noun sg] at a [noun]	15
19	[prep] [noun sg] at a [noun prp]	12
20	[prep] [noun sg] at a cost	12
21	[prep] [noun sg] at a cost	12
22	[prep] [noun sg] at a rate	10
23	[prep] [noun sg] at a rate	10
24	by [noun sg] at a [noun]	10
25	by [noun sg] at a [noun]	10
26	[prep] work at a [noun]	9
27	[prep] sale at a [noun]	9
28	[prep] water at a [noun]	8
29	[prep] [noun sg] at a [noun pl]	8
30	[prep] honour at a [noun]	7