SN4 ""

No	Pattern	Freq
1	[verb] [been] [adj] for years	25
2	have [been] [adj] for years	25
3	[vb past] [been] [adj] for years	13
4	had [been] [adj] for years	13
5	[vb -s] [been] [adj] for years	7
6	[vb base] [been] [adj] for years	5
7	[been] [adj] for [adj] years	122
8	[been] [adj] for [num] years	80
9	[been] [adj] for [det] years	42
10	[been] [adj] for many years	19
11	[been] [adj] for many years	19
12	[been] [adj] for some years	12
13	[been] [adj] for some years	12
14	[been] [adj] for several years	10
15	[been] [adj] for several years	10
16	[been] [adj] for five years	6
17	[been] [adj] for five years	6
18	[been] [adj] for six years	6
19	[been] [adj] for six years	6
20	[been] [adj] for twenty years	5
21	[been] [adj] for four years	5
22	[been] [adj] for four years	5
23	[been] [adj] for twenty years	5
24	[been] [adj] for years and	5
25	[been] [adj] for years [conj]	5
26	[been] [adj] for years and	5
27	[been] [adj] for years [coord]	5