SN4 ""

No	Pattern	Freq
1	[noun sg] over the last [num] years	195
2	[noun pl] over the last [num] years	98
3	[noun] over the last two years	38
4	[noun] over the last ten years	34
5	[noun prp] over the last [num] years	33
6	[noun] over the last three years	25
7	[noun] over the last twenty years	23
8	[noun] over the last five years	22
9	[noun] over the last 30 years	18
10	[noun] over the last 10 years	17
11	[noun] over the last 20 years	16
12	[n mass] over the last [num] years	15
13	[noun] over the last thirty years	15
14	[noun] over the last 25 years	11
15	[noun] over the last four years	10
16	[noun] over the last six years	8
17	[noun] over the last 15 years	8
18	change over the last [num] years	7
19	[noun] over the last fifteen years	7
20	government over the last [num] years	7
21	[noun] over the last 13 years	6
22	time over the last [num] years	6
23	development over the last [num] years	6
24	work over the last [num] years	5
25	[noun] over the last 40 years	5
26	development over the last [num] years	5
27	[noun] over the last 150 years	5
28	work over the last [num] years	5