SN4 ""

No	Pattern	Freq
1	[prep] the [num ord] 20 years	178
2	[prep] the [num ord] 20 years	178
3	over the [num ord] 20 years	77
4	over the [num ord] 20 years	77
5	in the [num ord] 20 years	48
6	in the [num ord] 20 years	48
7	for the [num ord] 20 years	29
8	for the [num ord] 20 years	29
9	of the [num ord] 20 years	8
10	of the [num ord] 20 years	8
11	within the [num ord] 20 years	7
12	within the [num ord] 20 years	7
13	during the [num ord] 20 years	6
14	during the [num ord] 20 years	6
15	the [num ord] 20 years [verb]	19
16	the [num ord] 20 years [conj]	17
17	the [num ord] 20 years [prep]	15
18	the [num ord] 20 years [prep]	15
19	the [num ord] 20 years [coord]	15
20	the [num ord] 20 years have	13
21	the [num ord] 20 years or	8
22	the [num ord] 20 years or	8
23	the [num ord] 20 years [pron]	7
24	the [num ord] 20 years has	7
25	the [num ord] 20 years [vb -s]	7
26	the [num ord] 20 years [art]	7
27	the [num ord] 20 years and	7
28	the [num ord] 20 years [art]	7
29	the [num ord] 20 years and	7
30	the [num ord] 20 years [noun]	6