SN4 ""

No	Pattern	Freq
1	three main [noun pl]	587
2	three main [noun sg]	58
3	three main type	43
4	three main types	43
5	three main area	37
6	three main areas	37
7	three main reason	32
8	three main reasons	31
9	three main ways	21
10	three main way	21
11	three main categories	17
12	three main party	17
13	three main groups	17
14	three main category	17
15	three main group	17
16	three main source	16
17	three main sources	16
18	three main parties	14
19	three main opposition	14
20	three main opposition	14
21	three main aims	12
22	three main aim	12
23	three main stages	11
24	three main stage	11
25	three main problems	10
26	three main problem	10
27	three main strand	9
28	three main parts	9
29	three main factor	9
30	three main aspect	9