SN4 ""

No	Pattern	Freq
1	had been [vb pp] for [adj] [noun pl]	113
2	had be [vb pp] for [num] [noun pl]	49
3	had be [vb pp] for [adj] years	36
4	had be [vb pp] for [adj] [noun pl]	33
5	had be [vb pp] for [det] [noun pl]	31
6	had be [vb pp] for many [noun pl]	14
7	had be [vb pp] for many [noun pl]	14
8	had be used for [adj] [noun pl]	12
9	had be [vb pp] for [adj] months	12
10	had be [vb pp] for [adj] purposes	9
11	had be [vb pp] for [adj] days	7
12	had be [vb pp] for several [noun pl]	7
13	had be [vb pp] for several [noun pl]	7
14	had be [vb pp] for some [noun pl]	6
15	had be [vb pp] for [adj] reasons	6
16	had be [vb pp] for some [noun pl]	6
17	had be [vb pp] for three [noun pl]	5
18	had be [vb pp] for [adj] weeks	5
19	had be [vb pp] for political [noun pl]	5
20	had be [vb pp] for three [noun pl]	5
21	had be [vb pp] for political [noun pl]	5
22	had be [vb pp] for [adj] offences	5
23	had be [vb pp] for two [noun pl]	5
24	had be [vb pp] for two [noun pl]	5