SN4 ""

No	Pattern	Freq
1	but [prep] [adj] years	150
2	but [prep] [num] years	70
3	but in [adj] years	69
4	but [prep] [adj] years	57
5	but [prep] recent years	51
6	but [prep] recent years	51
7	but for [adj] years	26
8	but after [adj] years	25
9	but [prep] [det] years	16
10	but [prep] two years	15
11	but [prep] two years	15
12	but within [adj] years	12
13	but [prep] many years	8
14	but [prep] late years	8
15	but [prep] many years	8
16	but [prep] [adj -er] years	7
17	but [prep] later years	7
18	but [prep] three years	6
19	but [prep] three years	6
20	but [prep] five years	5
21	but [prep] 10 years	5
22	but [prep] five years	5
23	but at [adj] years	5
24	but [prep] 20 years	5
25	but [prep] 20 years	5
26	but [prep] 10 years	5