SN4 ""

No	Pattern	Freq
1	been [vb pp] for [adj] of years	12
2	been [vb pp] for [adj] of years	12
3	been [vb pp] for [adj] [prep] years	12
4	been [vb pp] for [adj] [prep] years	12
5	been [vb pp] for [adj] [adj] years	10
6	been [vb pp] for [adj] [num] years	9
7	[verb] been [vb pp] for [adj] years	162
8	have been [vb pp] for [adj] years	162
9	[vb -s] been [vb pp] for [adj] years	84
10	has been [vb pp] for [adj] years	78
11	[vb past] been [vb pp] for [adj] years	38
12	[vb base] been [vb pp] for [adj] years	37
13	had been [vb pp] for [adj] years	36
14	have been [vb pp] for [adj] years	30
15	[adv] been [vb pp] for [adj] years	25
16	[not/n't] been [vb pp] for [adj] years	21
17	not been [vb pp] for [adj] years	21
18	not been [vb pp] for [adj] years	13
19	n't been [vb pp] for [adj] years	8
20	've been [vb pp] for [adj] years	7
21	's been [vb pp] for [adj] years	6
22	been [adv] [vb pp] for [adj] years	11
23	been [adv] [vb pp] for [adj] years	11
24	been [vb pp] [adv] for [adj] years	14
25	been [vb pp] [adv prt] for [adj] years	8
26	been [vb pp] [adv] for [adj] years	6
27	been [vb pp] for [adv] [adj] years	38
28	been [vb pp] for [adv] [adj] years	37
29	been [vb pp] for over [adj] years	20
30	been [vb pp] for over [adj] years	20