SN4 ""

No	Pattern	Freq
1	at the [adj -est] [noun]	721
2	at the [adj -est] [noun sg]	603
3	at the [adj -est] level	243
4	at the highest [noun]	238
5	at the [adj -est] level	206
6	at the [adj -est] [noun pl]	108
7	at the lowest [noun]	96
8	at the earliest [noun]	85
9	at the [adj -est] opportunity	76
10	at the [adj -est] opportunity	76
11	at the best [noun]	42
12	at the latest [noun]	40
13	at the [adj -est] point	39
14	at the [adj -est] point	38
15	at the [adj -est] levels	37
16	at the slightest [noun]	37
17	at the nearest [noun]	33
18	at the [adj -est] price	29
19	at the [adj -est] price	24
20	at the [adj -est] end	18
21	at the [adj -est] rate	17
22	at the simplest [noun]	17
23	at the [adj -est] end	17
24	at the [adj -est] time	15
25	at the [adj -est] rate	14
26	at the deepest [noun]	11
27	at the [adj -est] [noun prp]	10
28	at the [adj -est] part	9
29	at the [adj -est] part	9
30	at the worst [noun]	9