SN4 ""

No	Pattern	Freq
1	[prep] the past [adj] years	2536
2	[prep] the past [num] years	2117
3	over the past [adj] years	971
4	over the past [adj] years	971
5	in the past [adj] years	647
6	in the past [adj] years	647
7	for the past [adj] years	572
8	for the past [adj] years	572
9	[prep] the past [det] years	417
10	[prep] the past few years	415
11	[prep] the past few years	415
12	[prep] the past two years	312
13	[prep] the past two years	312
14	[prep] the past five years	200
15	[prep] the past five years	200
16	during the past [adj] years	177
17	during the past [adj] years	177
18	[prep] the past three years	176
19	[prep] the past three years	176
20	[prep] the past ten years	136
21	[prep] the past ten years	136
22	of the past [adj] years	134
23	of the past [adj] years	134
24	[prep] the past 10 years	131
25	[prep] the past 10 years	131
26	[prep] the past 20 years	119
27	[prep] the past 20 years	119
28	[prep] the past four years	104
29	[prep] the past four years	104
30	[prep] the past 30 years	79