SN4 ""

No	Pattern	Freq
1	at [adj] level	2686
2	at [adj] level	1482
3	at [adj] levels	1204
4	at [adj] level	1171
5	at [det] level	1148
6	at all level	474
7	at all level	474
8	at this level	298
9	at this level	298
10	at [num] level	248
11	at local level	174
12	at local level	174
13	at different level	118
14	at different level	118
15	at one level	116
16	at one level	116
17	at national level	115
18	at national level	115
19	at [adj -er] level	113
20	at low level	108
21	at that level	95
22	at that level	95
23	at high level	90
24	at any level	77
25	at any level	77
26	at low level	56
27	at international level	54
28	at international level	54
29	at lower level	51
30	at various level	51