SN4 ""

No	Pattern	Freq
1	[noun] [adj] at a [noun sg]	145
2	[noun] [num] at a [noun sg]	100
3	[noun prp] [adj] at a [noun sg]	56
4	[noun] [adj] at a time	54
5	[noun sg] [adj] at a [noun sg]	43
6	[noun pl] [adj] at a [noun sg]	42
7	[noun] [adj] at a [noun sg]	38
8	[noun] two at a [noun sg]	22
9	[noun] two at a [noun sg]	22
10	stairs [adj] at a [noun sg]	16
11	stairs [adj] at a [noun sg]	16
12	[noun] available at a [noun sg]	15
13	[noun] available at a [noun sg]	15
14	[noun] one at a [noun sg]	14
15	[noun] [adj] at a meeting	14
16	[noun] one at a [noun sg]	14
17	[noun] [adj] at a supplement	11
18	march [adj] at a [noun sg]	8
19	march [adj] at a [noun sg]	8
20	[noun] three at a [noun sg]	8
21	[noun] [adj] at a cost	8
22	[noun] three at a [noun sg]	8
23	may [adj] at a [noun sg]	5
24	may [adj] at a [noun sg]	5
25	room [adj] at a [noun sg]	5
26	[noun] [det] at a [noun sg]	5