SN4 ""

No	Pattern	Freq
1	[num] when	3567
2	1989 when	101
3	1989 when	101
4	1990 when	92
5	1990 when	92
6	1991 when	79
7	1991 when	79
8	1987 when	66
9	1987 when	66
10	1986 when	61
11	1986 when	61
12	1988 when	58
13	1988 when	58
14	[adj] when	50
15	[det] when	43
16	1984 when	43
17	1970s when	43
18	1984 when	43
19	1970s when	43
20	1985 when	42
21	1985 when	42
22	1983 when	38
23	1983 when	38
24	1992 when	37
25	1992 when	37
26	1960s when	36
27	1960s when	36
28	1982 when	35
29	1982 when	35
30	two when	33