SN4 ""

No	Pattern	Freq
1	[art] [noun] of years [adv]	300
2	[art] [noun] of years [adv]	300
3	a [noun] of years [adv]	295
4	a [noun] of years [adv]	295
5	[adj] [noun] of years [adv]	11
6	[num ord] [noun] of years [adv]	7
7	[noun] [num] of years [adv]	17
8	[noun] [adj] of years [adv]	17
9	[noun] thousands of years [adv]	10
10	[noun] thousands of years [adv]	10
11	[noun] hundreds of years [adv]	5
12	[noun] hundreds of years [adv]	5
13	[noun] of [adj] years [adv]	193
14	[noun] of [num] years [adv]	178
15	[noun] of two years [adv]	28
16	[noun] of two years [adv]	28
17	[noun] of five years [adv]	12
18	[noun] of ten years [adv]	12
19	[noun] of ten years [adv]	12
20	[noun] of five years [adv]	12
21	[noun] of thirty years [adv]	10
22	[noun] of twenty years [adv]	10
23	[noun] of three years [adv]	10
24	[noun] of [det] years [adv]	10
25	[noun] of twenty years [adv]	10
26	[noun] of thirty years [adv]	10
27	[noun] of three years [adv]	10
28	[noun] of four years [adv]	8
29	[noun] of four years [adv]	8
30	[noun] of fifty years [adv]	6