SN4 ""

No	Pattern	Freq
1	of [num] years	1845
2	of [adj] years	259
3	of [det] years	188
4	of five years	185
5	of five years	185
6	of two years	180
7	of two years	180
8	of three years	159
9	of three years	159
10	of recent years	128
11	of recent years	128
12	of ten years	101
13	of ten years	101
14	of four years	83
15	of four years	83
16	of seven years	64
17	of seven years	64
18	of 10 years	57
19	of 10 years	57
20	of several years	52
21	of several years	52
22	of twenty years	52
23	of twenty years	52
24	of many years	47
25	of many years	47
26	of 20 years	46
27	of 20 years	46
28	of six years	45
29	of six years	45
30	of [adj -er] years	42