SN4 ""

No	Pattern	Freq
1	[vb pp] at a [adj -er] [noun sg]	216
2	[vb pp] at a later [noun]	101
3	[vb pp] at a [adj -er] date	70
4	[vb pp] at a [adj -er] date	70
5	[vb pp] at a [adj -er] time	35
6	[vb pp] at a [adj -er] time	35
7	[vb pp] at a lower [noun]	28
8	[vb pp] at a [adj -er] stage	26
9	[vb pp] at a [adj -er] stage	26
10	come at a [adj -er] [noun]	24
11	[vb pp] at a [adj -er] rate	23
12	[vb pp] at a [adj -er] rate	23
13	[vb pp] at a higher [noun]	21
14	[vb pp] at a [adj -er] level	19
15	[vb pp] at a [adj -er] level	19
16	[vb pp] at a better [noun]	18
17	[vb pp] at a worse [noun]	15
18	[vb pp] at a faster [noun]	7
19	[vb pp] at a [adj -er] price	6
20	added at a [adj -er] [noun]	6
21	[vb pp] at a [adj -er] price	6
22	removed at a [adj -er] [noun]	5
23	considered at a [adj -er] [noun]	5
24	[vb pp] at a wider [noun]	5
25	aimed at a [adj -er] [noun]	5
26	[vb pp] at a further [noun]	5
27	paid at a [adj -er] [noun]	5