SN4 ""

No	Pattern	Freq
1	[noun] [prep] three years	605
2	[noun sg] [prep] three years	444
3	[noun] for three years	267
4	[noun] of three years	129
5	[noun pl] [prep] three years	88
6	[noun] in three years	86
7	[noun prp] [prep] three years	58
8	period [prep] three years	47
9	period [prep] three years	44
10	[noun] after three years	38
11	[noun] within three years	34
12	time [prep] three years	32
13	time [prep] three years	30
14	[noun] to three years	20
15	[n mass] [prep] three years	13
16	sentence [prep] three years	10
17	month [prep] three years	10
18	sentence [prep] three years	8
19	end [prep] three years	8
20	end [prep] three years	8
21	term [prep] three years	7
22	year [prep] three years	7
23	[noun] with three years	7
24	age [prep] three years	7
25	year [prep] three years	7
26	age [prep] three years	7
27	minimum [prep] three years	6
28	degree [prep] three years	6
29	minimum [prep] three years	6
30	degree [prep] three years	6