SN4 ""

No	Pattern	Freq
1	had been [vb pp] for [adj] [noun]	194
2	had be [vb pp] for [adj] [noun pl]	113
3	had be [vb pp] for [adj] [noun sg]	79
4	had be [vb pp] for [det] [noun]	72
5	had be [vb pp] for [adj] [noun]	67
6	had be [vb pp] for [num] [noun]	50
7	had be [vb pp] for [adj] year	38
8	had be [vb pp] for [adj] years	36
9	had be [vb pp] for some [noun]	29
10	had be [vb pp] for some [noun]	29
11	had be [vb pp] for [adj] time	21
12	had be [vb pp] for [adj] time	21
13	had be [vb pp] for many [noun]	14
14	had be [vb pp] for many [noun]	14
15	had be used for [adj] [noun]	12
16	had be [vb pp] for [adj] reason	12
17	had be [vb pp] for [adj] months	12
18	had be [vb pp] for [adj] month	12
19	had be [vb pp] for [adj] purpose	11
20	had be [vb pp] for [adj] purposes	9
21	had be made for [adj] [noun]	9
22	had be [vb pp] for this [noun]	7
23	had be [vb pp] for several [noun]	7
24	had be [vb pp] for [adj] days	7
25	had be [vb pp] for [adj] day	7
26	had be [vb pp] for several [noun]	7
27	had be [vb pp] for this [noun]	7
28	had be [vb pp] for [adj] reason	6
29	had be [vb pp] for [adj] reasons	6
30	had be [vb pp] for two [noun]	5