SN4 ""

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