SN4 ""

No	Pattern	Freq
31	[noun] [prep] 20 years	237
32	[noun] [prep] 20 years	237
33	[noun] within [adj] years	236
34	age [prep] [adj] years	218
35	age [prep] [adj] years	212
36	[noun] [prep] 10 years	212
37	[noun] [prep] 10 years	212
38	[noun] [prep] seven years	203
39	[noun] [prep] seven years	203
40	[noun] over [adj] years	199
41	[noun] to [adj] years	193
42	[noun] [prep] six years	186
43	[noun] [prep] six years	186
44	[noun] [prep] some years	178
45	[noun] [prep] some years	178
46	[n mass] [prep] [adj] years	159
47	[noun] [prep] twenty years	157
48	[noun] [prep] twenty years	157
49	[noun] [prep] 25 years	156
50	[noun] [prep] 30 years	156
51	[noun] [prep] 25 years	156
52	[noun] [prep] 30 years	156
53	[noun] [prep] eight years	135
54	[noun] [prep] eight years	135
55	[noun] [prep] 15 years	127
56	[noun] [prep] 15 years	127
57	[noun] [prep] [adj -er] years	122
58	[noun] [prep] these years	107
59	[noun] [prep] these years	107
60	month [prep] [adj] years	93