SN4 ""

No	Pattern	Freq
1	[prep] fifteen years [pers pn]	7
2	[prep] fifteen years [pers pn]	7
3	[adj] fifteen years [pers pn]	6
4	[num ord] fifteen years [pers pn]	5
5	fifteen years [conj] [pers pn]	20
6	fifteen years [adv] [pers pn]	16
7	fifteen years [adv] [pers pn]	16
8	fifteen years ago [pers pn]	11
9	fifteen years ago [pers pn]	11
10	fifteen years [subord] [pers pn]	9
11	fifteen years [coord] [pers pn]	8
12	fifteen years and [pers pn]	7
13	fifteen years and [pers pn]	7
14	fifteen years [pers pn] [verb]	15
15	fifteen years [pers pn] have	9
16	fifteen years [pers pn] [vb base]	8
17	fifteen years [pers pn] [vb past]	7
18	fifteen years [pers pn] 've	5