SN4 ""

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