SN4 ""

No	Pattern	Freq
1	[prep] fifteen years [pron]	10
2	[prep] fifteen years [pron]	10
3	[adj] fifteen years [pron]	6
4	[num ord] fifteen years [pron]	5
5	fifteen years [conj] [pron]	24
6	fifteen years [adv] [pron]	19
7	fifteen years [adv] [pron]	19
8	fifteen years ago [pron]	13
9	fifteen years ago [pron]	13
10	fifteen years [coord] [pron]	11
11	fifteen years [subord] [pron]	10
12	fifteen years and [pron]	8
13	fifteen years and [pron]	8
14	fifteen years [pron] [verb]	16
15	fifteen years [pron] have	10
16	fifteen years [pron] [vb base]	8
17	fifteen years [pron] [noun]	7
18	fifteen years [pron] [vb past]	7
19	fifteen years [pron] [noun sg]	6
20	fifteen years [pron] [was/were]	5
21	fifteen years [pron] 've	5
22	fifteen years [pron] was	5
23	fifteen years [pron] [be]	5
24	fifteen years [pron] be	5