SN4 ""

No	Pattern	Freq
1	been [verb] on the [noun]	973
2	[been] [verb] on the [noun]	973
3	[been] [vb pp] on the [noun]	812
4	[been] [verb] on the [noun sg]	787
5	[been] [v-ing] on the [noun]	157
6	[been] [verb] on the [noun pl]	133
7	[been] [verb] on the basis	51
8	[been] [verb] on the basis	51
9	[been] [verb] on the [noun prp]	48
10	[been] [verb] on the ground	46
11	[been] work on the [noun]	43
12	[been] based on the [noun]	43
13	[been] base on the [noun]	43
14	[been] working on the [noun]	41
15	[been] placed on the [noun]	41
16	[been] place on the [noun]	41
17	[been] put on the [noun]	36
18	[been] put on the [noun]	35
19	[been] do on the [noun]	31
20	[been] done on the [noun]	29
21	[been] made on the [noun]	28
22	[been] make on the [noun]	28
23	[been] [verb] on the grounds	28
24	[been] written on the [noun]	21
25	[been] write on the [noun]	21
26	[been] focus on the [noun]	20
27	[been] spent on the [noun]	19
28	[been] [verb] on the subject	19
29	[been] spend on the [noun]	19
30	[been] [verb] on the subject	19