SN4 ""

No	Pattern	Freq
1	[noun] [prep] the previous [adj] years	129
2	[noun] [prep] the previous [num] years	125
3	[noun sg] [prep] the previous [adj] years	70
4	[noun pl] [prep] the previous [adj] years	46
5	[noun] over the previous [adj] years	33
6	[noun] of the previous [adj] years	28
7	[noun] [prep] the previous three years	25
8	[noun] in the previous [adj] years	25
9	[noun] [prep] the previous three years	25
10	[noun] for the previous [adj] years	19
11	[noun] during the previous [adj] years	19
12	[noun] [prep] the previous two years	17
13	[noun] [prep] the previous five years	17
14	[noun] [prep] the previous two years	17
15	[noun] [prep] the previous five years	17
16	[noun prp] [prep] the previous [adj] years	11
17	[noun] [prep] the previous fifteen years	7
18	[noun] [prep] the previous fifteen years	7
19	[noun] [prep] the previous six years	6
20	[noun] [prep] the previous six years	6
21	[noun] [prep] the previous hundred years	6
22	time [prep] the previous [adj] years	6
23	[noun] [prep] the previous hundred years	6
24	[noun] [prep] the previous twenty years	5
25	[noun] [prep] the previous twenty years	5