SN4 ""

No	Pattern	Freq
1	been [adj] for [noun]	231
2	been [adj] for [noun pl]	106
3	been [adj] for [noun sg]	69
4	been [adj] for [noun prp]	67
5	been [adj] for year	30
6	been [adj] for years	30
7	been responsible for [noun]	21
8	been responsible for [noun]	21
9	been good for [noun]	19
10	been good for [noun]	13
11	been available for [noun]	12
12	been available for [noun]	12
13	been dead for [noun]	11
14	been easy for [noun]	11
15	been [adj -er] for [noun]	11
16	been dead for [noun]	11
17	been easy for [noun]	10
18	been [adj] for centuries	8
19	been necessary for [noun]	8
20	been necessary for [noun]	8
21	been [adj] for century	8
22	been [adj] for months	7
23	been [adj] for month	7
24	been possible for [noun]	7
25	been [adj] for hour	7
26	been possible for [noun]	7
27	been [adj] for hours	7
28	been [adj] for britain	6
29	been [adj] for britain	6
30	been bad for [noun]	6