SN4 ""

No	Pattern	Freq
1	been [adj] for [noun pl]	100
2	been [adj] for [noun sg]	65
3	been [adj] for [noun prp]	62
4	been [adj] for years	30
5	been [adj] for year	30
6	been responsible for [noun]	21
7	been good for [noun]	13
8	been available for [noun]	12
9	been dead for [noun]	11
10	been easy for [noun]	10
11	been [adj] for century	8
12	been necessary for [noun]	8
13	been [adj] for centuries	8
14	been [adj] for hours	7
15	been [adj] for month	7
16	been possible for [noun]	7
17	been [adj] for months	7
18	been [adj] for hour	7
19	been [adj] for britain	5
20	been [adj] for business	5
21	been difficult for [noun]	5
22	been [adj] for britain	5