SN4 ""

No	Pattern	Freq
1	at the [noun] of	41276
2	at the [noun sg] of	39413
3	at the end of	9417
4	at the end of	9363
5	at the time of	2795
6	at the time of	2792
7	at the beginning of	2230
8	at the beginning of	2227
9	at the [noun pl] of	1777
10	at the top of	1570
11	at the top of	1552
12	at the age of	1460
13	at the age of	1442
14	at the back of	1167
15	at the back of	1162
16	at the expense of	1088
17	at the expense of	1088
18	at the start of	1051
19	at the start of	1049
20	at the bottom of	1043
21	at the bottom of	1043
22	at the heart of	887
23	at the heart of	884
24	at the university of	814
25	at the university of	796
26	at the centre of	752
27	at the centre of	748
28	at the foot of	636
29	at the foot of	585
30	at the level of	557