SN4 ""

No	Pattern	Freq
1	[verb] [adv] twenty minutes	30
2	[prep] [adv] twenty minutes	29
3	[prep] [adv] twenty minutes	29
4	[adv] [adv] twenty minutes	25
5	[adv] [adv] twenty minutes	15
6	take [adv] twenty minutes	12
7	for [adv] twenty minutes	12
8	for [adv] twenty minutes	12
9	[be] [adv] twenty minutes	11
10	be [adv] twenty minutes	11
11	[adv prt] [adv] twenty minutes	10
12	in [adv] twenty minutes	9
13	in [adv] twenty minutes	9
14	[vb past] [adv] twenty minutes	8
15	[vb -s] [adv] twenty minutes	6
16	[noun] [adv] twenty minutes	6
17	[conj] [adv] twenty minutes	6
18	[v-ing] [adv] twenty minutes	6
19	[is] [adv] twenty minutes	5
20	[vb infin] [adv] twenty minutes	5
21	in [adv] twenty minutes	5
22	[subord] [adv] twenty minutes	5
23	[pron] [adv] twenty minutes	5
24	in [adv] twenty minutes	5
25	[pers pn] [adv] twenty minutes	5
26	[adv] [prep] twenty minutes	34
27	[adv] [prep] twenty minutes	34
28	[adv] [adv] twenty minutes	25
29	[adv] [adv] twenty minutes	25
30	[adv] about twenty minutes	18