SN4 ""

No	Pattern	Freq
1	[prep] at [adv] [adj] years	320
2	[prep] at [adv] [adj] years	320
3	for at [adv] [adj] years	252
4	for at [adv] [adj] years	252
5	[verb] at [adv] [adj] years	95
6	[be] at [adv] [adj] years	72
7	be at [adv] [adj] years	72
8	of at [adv] [adj] years	46
9	of at [adv] [adj] years	46
10	[vb infin] at [adv] [adj] years	28
11	[be] at [adv] [adj] years	27
12	be at [adv] [adj] years	27
13	[noun] at [adv] [adj] years	25
14	take at [adv] [adj] years	24
15	[is] at [adv] [adj] years	23
16	is at [adv] [adj] years	21
17	[noun sg] at [adv] [adj] years	19
18	[to-vb] at [adv] [adj] years	15
19	have at [adv] [adj] years	15
20	[adv] at [adv] [adj] years	15
21	take at [adv] [adj] years	14
22	[vb pp] at [adv] [adj] years	13
23	[was/were] at [adv] [adj] years	12
24	[vb base] at [adv] [adj] years	12
25	[conj] at [adv] [adj] years	11
26	[vb -s] at [adv] [adj] years	11
27	[vb past] at [adv] [adj] years	10
28	was at [adv] [adj] years	10
29	[adv prt] at [adv] [adj] years	10
30	with at [adv] [adj] years	8