SN4 ""

No	Pattern	Freq
1	had been [vb pp] on	903
2	has been [vb pp] on	858
3	have been [vb pp] on	504
4	have been [vb pp] on	173
5	have been based on	145
6	have been put on	112
7	have been placed on	109
8	to have been [vb pp] on	95
9	have been done on	89
10	have been spent on	83
11	have been made on	74
12	have been built on	53
13	have been written on	48
14	have been released on	47
15	have been focused on	43
16	have been found on	42
17	having been [vb pp] on	38
18	have been arrested on	36
19	's been [vb pp] on	35
20	have been reached on	32
21	have been used on	31
22	have been imposed on	25
23	have been left on	24
24	have been recorded on	24
25	have been published on	21
26	have been killed on	20
27	'd been [vb pp] on	19
28	have been held on	18
29	have been cast on	16
30	have been conducted on	16