SN4 ""

No	Pattern	Freq
1	[adv] twenty years [prep] [art] [noun sg]	10
2	[adj] twenty years [prep] [art] [noun sg]	10
3	[adv] twenty years [prep] [art] [noun sg]	9
4	[prep] twenty years [prep] [art] [noun sg]	7
5	[prep] twenty years [prep] [art] [noun sg]	7
6	[conj] twenty years [prep] [art] [noun sg]	6
7	over twenty years [prep] [art] [noun sg]	5
8	over twenty years [prep] [art] [noun sg]	5
9	[det] twenty years [prep] [art] [noun sg]	5
10	twenty five years [prep] [art] [noun sg]	7
11	twenty [adj] years [prep] [art] [noun sg]	7
12	twenty five years [prep] [art] [noun sg]	7
13	twenty [num] years [prep] [art] [noun sg]	7
14	twenty years [adv] [prep] [art] [noun sg]	8
15	twenty years [adv] [prep] [art] [noun sg]	8
16	twenty years [prep] [art] [adj] [noun sg]	14
17	twenty years [prep] [art] [num ord] [noun sg]	7
18	twenty years [prep] [art] [adj] [noun sg]	6
19	twenty years [prep] [art] [noun sg] [prep]	16
20	twenty years [prep] [art] [noun sg] [prep]	16
21	twenty years [prep] [art] [noun sg] of	15
22	twenty years [prep] [art] [noun sg] of	15