SN4 ""

No	Pattern	Freq
1	[verb] over years	6
2	[vb pp] over years	6
3	over [art] years	1938
4	over [art] years	1938
5	over the years	1938
6	over the years	1938
7	over [adj] years	446
8	over [det] years	239
9	over many years	177
10	over many years	177
11	over [adj] years	144
12	over recent years	125
13	over recent years	125
14	over [num] years	63
15	over several years	45
16	over several years	45
17	over four years	8
18	over four years	8
19	over two years	8
20	over two years	8
21	over these years	7
22	over these years	7
23	over those years	6
24	over five years	6
25	over three years	6
26	over five years	6
27	over those years	6
28	over 10 years	6
29	over 10 years	6
30	over three years	6