SN4 ""

No	Pattern	Freq
1	[noun sg] [prep] four years	251
2	[noun] for four years	157
3	[noun] of four years	60
4	[noun] in four years	53
5	[noun pl] [prep] four years	34
6	[noun prp] [prep] four years	31
7	time [prep] four years	17
8	period [prep] four years	16
9	period [prep] four years	16
10	time [prep] four years	15
11	[noun] after four years	13
12	[noun] to four years	12
13	[noun] within four years	10
14	month [prep] four years	10
15	[n mass] [prep] four years	8
16	month [prep] four years	6
17	year [prep] four years	6
18	age [prep] four years	5
19	age [prep] four years	5
20	year [prep] four years	5