SN4 ""

No	Pattern	Freq
1	have been [adj] years	146
2	[verb] been [num] years	119
3	[vb past] been [adj] years	61
4	had been [adj] years	57
5	[vb -s] been [adj] years	34
6	[vb infin] been [adj] years	30
7	have been [adj] years	28
8	's been [adj] years	21
9	[vb base] been [adj] years	17
10	[verb] been [adj] years	15
11	[verb] been five years	15
12	[verb] been five years	15
13	has been [adj] years	13
14	[verb] been three years	12
15	[verb] been three years	12
16	[verb] been [det] years	11
17	[verb] been ten years	11
18	[verb] been ten years	11
19	have been [adj] years	10
20	[verb] been four years	9
21	[verb] been four years	9
22	've been [adj] years	7
23	[verb] been many years	6
24	[verb] been two years	6
25	[verb] been many years	6
26	[verb] been two years	6
27	[verb] been thirty years	5
28	[verb] been thirty years	5