SN4 ""

No	Pattern	Freq
1	have been [vb pp] for [adj] years	162
2	have [been] [vb pp] for [num] years	92
3	has [been] [vb pp] for [adj] years	78
4	have [been] [vb pp] for [det] years	70
5	have [been] [vb pp] for many years	50
6	have [been] [vb pp] for many years	50
7	had [been] [vb pp] for [adj] years	36
8	have [been] [vb pp] for [adj] years	30
9	have [been] jailed for [adj] years	26
10	have [been] known for [adj] years	16
11	have [been] [vb pp] for two years	15
12	have [been] [vb pp] for some years	15
13	have [been] [vb pp] for some years	15
14	have [been] [vb pp] for two years	15
15	have [been] [vb pp] for three years	14
16	have [been] [vb pp] for three years	14
17	have [been] used for [adj] years	12
18	have [been] [vb pp] for seven years	8
19	have [been] [vb pp] for seven years	8
20	have [been] [vb pp] for five years	7
21	've [been] [vb pp] for [adj] years	7
22	have [been] [vb pp] for five years	7
23	's [been] [vb pp] for [adj] years	6
24	have [been] separated for [adj] years	6
25	have [been] [vb pp] for 12 years	5
26	have [been] [vb pp] for several years	5
27	have [been] established for [adj] years	5
28	have [been] [vb pp] for several years	5
29	have [been] [vb pp] for 12 years	5
30	have [been] banned for [adj] years	5