SN4 ""

No	Pattern	Freq
1	[noun] [prep] [det] years	1599
2	[noun sg] [prep] [det] years	1035
3	[verb] [prep] [det] years	764
4	[vb pp] [prep] [det] years	367
5	[noun pl] [prep] [det] years	351
6	[adv] [prep] [det] years	268
7	[adj] [prep] [det] years	218
8	[noun prp] [prep] [det] years	195
9	[adv] [prep] [det] years	182
10	[conj] [prep] [det] years	148
11	[adj] [prep] [det] years	147
12	[pron] [prep] [det] years	123
13	[vb past] [prep] [det] years	119
14	have [prep] [det] years	107
15	[coord] [prep] [det] years	101
16	[be] [prep] [det] years	92
17	be [prep] [det] years	92
18	[pers pn] [prep] [det] years	82
19	and [prep] [det] years	81
20	and [prep] [det] years	81
21	[vb -s] [prep] [det] years	66
22	[v-ing] [prep] [det] years	64
23	[adv prt] [prep] [det] years	64
24	[vb base] [prep] [det] years	55
25	[vb infin] [prep] [det] years	49
26	has [prep] [det] years	47
27	[was/were] [prep] [det] years	47
28	[to-vb] [prep] [det] years	44
29	work [prep] [det] years	42
30	[det] [prep] [det] years	42