SN4 ""

No	Pattern	Freq
1	[noun] be at the [noun sg] [prep]	598
2	[noun] [be] at the [noun sg] of	560
3	[noun sg] [be] at the [noun sg] [prep]	347
4	[noun] [is] at the [noun sg] [prep]	258
5	[noun] [was/were] at the [noun sg] [prep]	241
6	[noun] is at the [noun sg] [prep]	234
7	[noun] was at the [noun sg] [prep]	174
8	[noun pl] [be] at the [noun sg] [prep]	134
9	[noun prp] [be] at the [noun sg] [prep]	109
10	[noun] are at the [noun sg] [prep]	93
11	[noun] [am/are] at the [noun sg] [prep]	93
12	[noun] [be] at the heart [prep]	90
13	[noun] [be] at the centre [prep]	82
14	[noun] were at the [noun sg] [prep]	67
15	[noun] [be] at the end [prep]	49
16	[noun] [be] at the forefront [prep]	44
17	[noun] [be] at the bottom [prep]	32
18	[noun] [be] at the top [prep]	28
19	[noun] [be] at the root [prep]	26
20	[noun] [be] at the back [prep]	25
21	[noun] 's at the [noun sg] [prep]	24
22	[noun] [be] at the mercy [prep]	19
23	[noun] [be] at the core [prep]	13
24	[noun] [be] at the time [prep]	13
25	[noun] [be] at the [noun sg] in	12
26	[noun] [be] at the discretion [prep]	12
27	[noun] [be] at the height [prep]	11
28	[noun] [be] at the level [prep]	8
29	[noun] [be] at the head [prep]	8
30	woman [be] at the [noun sg] [prep]	7