SN4 ""

No	Pattern	Freq
1	past [num] years [conj]	188
2	past [adj] years [coord]	184
3	past [adj] years and	112
4	past [adj] years and	112
5	past [adj] years or	58
6	past [adj] years or	58
7	past two years [conj]	27
8	past two years [conj]	27
9	past few years [conj]	26
10	past [det] years [conj]	26
11	past few years [conj]	26
12	past [adj] years [subord]	20
13	past 10 years [conj]	16
14	past 10 years [conj]	16
15	past ten years [conj]	16
16	past ten years [conj]	16
17	past [adj] years but	14
18	past [adj] years but	14
19	past five years [conj]	13
20	past five years [conj]	13
21	past four years [conj]	12
22	past four years [conj]	12
23	past [adj] years [that]	10
24	past [adj] years that	10
25	past [adj] years that	10
26	past 20 years [conj]	9
27	past six years [conj]	9
28	past six years [conj]	9
29	past three years [conj]	9
30	past 20 years [conj]	9