SN4 ""

No	Pattern	Freq
1	three years [prep]	916
2	three years of	236
3	three years of	236
4	three years in	129
5	three years in	129
6	three years after	108
7	three years after	108
8	three years at	56
9	three years at	56
10	three years from	53
11	three years from	53
12	three years for	51
13	three years for	51
14	three years to	49
15	three years to	49
16	three years before	46
17	three years before	46
18	three years on	37
19	three years on	37
20	three years with	35
21	three years with	35
22	three years as	26
23	three years as	26
24	three years without	15
25	three years without	15
26	three years by	14
27	three years by	14
28	three years since	8
29	three years since	8
30	three years behind	7