SN4 ""

No	Pattern	Freq
1	at [det] [noun pl]	3550
2	at all [noun pl]	1937
3	at [det] times	857
4	at [det] levels	556
5	at these [noun pl]	413
6	at [det] costs	228
7	at both [noun pl]	226
8	at some [noun pl]	216
9	at such [noun pl]	213
10	at those [noun pl]	170
11	at [det] ends	136
12	at several [noun pl]	128
13	at [det] stages	119
14	at many [noun pl]	111
15	at [det] points	105
16	at [det] events	96
17	at [det] sites	68
18	at most [noun pl]	64
19	at [det] ages	49
20	at [det] hours	46
21	at [det] meetings	39
22	at [det] moments	35
23	at [det] things	34
24	at [det] places	31
25	at any [noun pl]	29
26	at [det] hotels	25
27	at [det] saints	24
28	at [det] speeds	19
29	at [det] aspects	19
30	at [det] examples	17