SN4 ""

No	Pattern	Freq
1	[verb] at a [adj -er] [noun]	441
2	[verb] at a [adj -er] [noun sg]	438
3	[verb] at a [adj -er] [noun]	389
4	[vb pp] at a [adj -er] [noun]	246
5	[verb] at a later [noun]	149
6	[verb] at a [adj -er] date	101
7	[verb] at a [adj -er] date	101
8	[verb] at a [adj -er] stage	71
9	[verb] at a [adj -er] stage	71
10	[verb] at a higher [noun]	61
11	[verb] at a [adj -er] rate	58
12	[verb] at a [adj -er] rate	58
13	[verb] at a lower [noun]	57
14	[verb] at a [adj -er] level	54
15	[verb] at a [adj -er] level	54
16	[to-vb] at a [adj -er] [noun]	53
17	[verb] at an [adj -er] [noun]	52
18	[verb] at a earlier [noun]	50
19	[v-ing] at a [adj -er] [noun]	48
20	[verb] at a [adj -er] time	40
21	[verb] at a [adj -er] time	40
22	come at a [adj -er] [noun]	32
23	[vb -s] at a [adj -er] [noun]	27
24	[vb infin] at a [adj -er] [noun]	26
25	[verb] at a faster [noun]	26
26	come at a [adj -er] [noun]	24
27	[vb base] at a [adj -er] [noun]	23
28	[verb] at a better [noun]	19
29	[vb past] at a [adj -er] [noun]	18
30	[verb] at a worse [noun]	17