SN4 ""

No	Pattern	Freq
1	[adj] years before [pers pn]	198
2	[num] years before [pers pn]	138
3	[det] years before [pers pn]	56
4	[adj] years before he	53
5	[adj] years before they	42
6	[adj] years before i	34
7	two years before [pers pn]	29
8	two years before [pers pn]	29
9	[adj] years before it	28
10	many years before [pers pn]	23
11	many years before [pers pn]	23
12	[adj] years before she	17
13	[adj] years before we	14
14	ten years before [pers pn]	12
15	several years before [pers pn]	12
16	several years before [pers pn]	12
17	ten years before [pers pn]	12
18	five years before [pers pn]	11
19	three years before [pers pn]	11
20	three years before [pers pn]	11
21	five years before [pers pn]	11
22	four years before [pers pn]	10
23	[adj] years before you	10
24	some years before [pers pn]	10
25	some years before [pers pn]	10
26	four years before [pers pn]	10
27	six years before [pers pn]	6
28	six years before [pers pn]	6
29	twenty years before [pers pn]	6
30	twenty years before [pers pn]	6