SN4 ""

No	Pattern	Freq
1	[noun] to the problem	628
2	[noun sg] to the problem	520
3	solution to the problem	267
4	solution to the problem	209
5	[verb] to the problem	164
6	[noun pl] to the problem	106
7	approach to the problem	87
8	approach to the problem	77
9	answer to the problem	71
10	answer to the problem	60
11	solutions to the problem	58
12	[vb pp] to the problem	52
13	[adj] to the problem	50
14	[adj] to the problem	48
15	[adv] to the problem	43
16	response to the problem	35
17	add to the problem	34
18	response to the problem	28
19	attention to the problem	27
20	attention to the problem	27
21	[adv] to the problem	25
22	[v-ing] to the problem	23
23	[vb infin] to the problem	20
24	[vb base] to the problem	19
25	[to-vb] to the problem	19
26	[vb -s] to the problem	17
27	contribute to the problem	17
28	[adv prt] to the problem	17
29	relate to the problem	16
30	[pron] to the problem	14