SN4 ""

No	Pattern	Freq
1	[noun sg] at [adj] [noun pl]	1323
2	[noun pl] at [adj] [noun pl]	1171
3	[noun] at different [noun pl]	351
4	[noun] at [adj] times	341
5	[noun] at various [noun pl]	204
6	[noun] at [adj] intervals	188
7	[noun] at [adj] prices	174
8	[noun] at [adj] levels	173
9	[noun] at other [noun pl]	121
10	[noun] at [adj] points	106
11	[noun] at [adj] stages	100
12	[noun] at regular [noun pl]	97
13	[noun] at [adj] angles	93
14	[noun] at high [noun pl]	91
15	[noun] at certain [noun pl]	87
16	[noun] at low [noun pl]	83
17	[noun] at right [noun pl]	78
18	[noun] at [adj] rates	77
19	[n mass] at [adj] [noun pl]	73
20	[noun] at [adj] sites	70
21	[noun prp] at [adj] [noun pl]	65
22	[noun] at [adj] speeds	47
23	[noun] at [adj] ages	43
24	[noun] at [adj] meetings	39
25	place at [adj] [noun pl]	38
26	[noun] at close [noun pl]	38
27	[noun] at [adj] temperatures	38
28	[noun] at [adj] quarters	38
29	[noun] at local [noun pl]	37
30	look at [adj] [noun pl]	33