SN4 ""

No	Pattern	Freq
1	students ' [noun sg]	398
2	students ' [noun pl]	137
3	students ' union	92
4	students ' union	90
5	students ' association	37
6	students ' association	36
7	students ' work	27
8	students ' work	27
9	students ' learning	11
10	students ' learning	11
11	students ' need	10
12	students ' fee	9
13	students ' fees	9
14	students ' knowledge	8
15	students ' experience	8
16	students ' needs	8
17	students ' performance	8
18	students ' knowledge	8
19	students ' progress	7
20	students ' understanding	7
21	students ' progress	7
22	students ' understanding	7
23	students ' performance	7
24	students ' ability	7
25	students ' ability	7
26	students ' interest	5
27	students ' sense	5
28	students ' sense	5
29	students ' experience	5