SN4 ""

No	Pattern	Freq
1	been [v-ing] for [adj] [noun pl] [conj]	50
2	been [v-ing] for [adj] [noun] [coord]	50
3	been [v-ing] for [adj] [noun] and	44
4	been [v-ing] for [adj] [noun] and	44
5	been [v-ing] for [num] [noun] [conj]	36
6	been [v-ing] for [adj] years [conj]	33
7	been [v-ing] for [adj] year [conj]	33
8	been [v-ing] for [det] [noun] [conj]	25
9	been [v-ing] for some [noun] [conj]	16
10	been [v-ing] for some [noun] [conj]	16
11	been [v-ing] for [adj] [noun sg] [conj]	12
12	been [v-ing] for [adj] time [conj]	9
13	been [v-ing] for [adj] time [conj]	9
14	been [v-ing] for [adj] [noun] that	7
15	been [v-ing] for three [noun] [conj]	7
16	been [v-ing] for [adj] [noun] that	7
17	been [v-ing] for [adj] [noun] [that]	7
18	been running for [adj] [noun] [conj]	7
19	been [v-ing] for three [noun] [conj]	7
20	been [v-ing] for [adj] months [conj]	6
21	been [v-ing] for [adj] month [conj]	6
22	been [v-ing] for [adj] [noun] [subord]	6