SN4 ""

No	Pattern	Freq
1	[vb pp] in [adj] years	563
2	[vb pp] in [adj] years	392
3	[vb pp] in recent years	330
4	[vb pp] in recent years	330
5	[vb pp] in [num] years	128
6	changed in [adj] years	25
7	[vb pp] in [adj -er] years	23
8	made in [adj] years	23
9	[vb pp] in previous years	22
10	[vb pp] in previous years	22
11	[vb pp] in [det] years	19
12	increased in [adj] years	18
13	[vb pp] in two years	17
14	declined in [adj] years	17
15	[vb pp] in two years	17
16	developed in [adj] years	16
17	seen in [adj] years	15
18	done in [adj] years	14
19	[vb pp] in later years	14
20	[vb pp] in late years	14
21	[vb pp] in five years	12
22	[vb pp] in five years	12
23	taken in [adj] years	11
24	given in [adj] years	10
25	[vb pp] in earlier years	9
26	achieved in [adj] years	9
27	had in [adj] years	9
28	[vb pp] in early years	9
29	[vb pp] in 20 years	9
30	doubled in [adj] years	9