SN4 ""

No	Pattern	Freq
1	over [art] [det] years	15
2	over [art] [det] years	15
3	over a [det] years	11
4	over a [det] years	11
5	over [det] [det] years	9
6	over [adj] [det] years	9
7	over all [det] years	5
8	over [adv] [det] years	5
9	over all [det] years	5
10	[noun] over [det] years	117
11	[noun sg] over [det] years	68
12	[verb] over [det] years	57
13	[vb pp] over [det] years	52
14	[noun pl] over [det] years	36
15	[adv] over [det] years	27
16	[adv prt] over [det] years	15
17	[adv] over [det] years	12
18	up over [det] years	10
19	up over [det] years	10
20	develop over [det] years	8
21	developed over [det] years	8
22	[adj] over [det] years	8
23	[noun prp] over [det] years	8
24	spread over [det] years	6
25	spread over [det] years	6
26	[n mass] over [det] years	5
27	[conj] over [det] years	5
28	[adj] over [det] years	5
29	over [det] [adj] years	29
30	over [det] [num] years	15