SN4 ""

No	Pattern	Freq
1	[prep] three years	1472
2	[prep] three years	1472
3	for three years	608
4	for three years	608
5	to three years	200
6	to three years	200
7	in three years	163
8	in three years	163
9	of three years	159
10	of three years	159
11	after three years	146
12	after three years	146
13	within three years	99
14	within three years	99
15	from three years	14
16	from three years	14
17	with three years	13
18	with three years	13
19	by three years	11
20	by three years	11
21	until three years	11
22	until three years	11
23	at three years	9
24	at three years	9
25	over three years	6
26	over three years	6
27	past three years	5
28	like three years	5
29	like three years	5
30	past three years	5