SN4 ""

No	Pattern	Freq
1	[verb] [adv] for hours	72
2	[v-ing] [adv] for hours	20
3	be [adv] for hours	19
4	[be] [adv] for hours	19
5	sit [adv] for hours	17
6	[vb infin] [adv] for hours	16
7	go [adv] for hours	14
8	[vb past] [adv] for hours	13
9	[vb pp] [adv] for hours	11
10	been [adv] for hours	8
11	[been] [adv] for hours	8
12	sitting [adv] for hours	8
13	[adv] [adv] for hours	8
14	[be] [adv] for hours	7
15	[vb base] [adv] for hours	7
16	be [adv] for hours	7
17	go [adv] for hours	6
18	[adv prt] [adv] for hours	5
19	[adv] [verb] for hours	19
20	[adv] [adv] for hours	8
21	[adv] [adv] for hours	7
22	[adv] [vb infin] for hours	6
23	[adv] [vb pp] for hours	5
24	[adv] [v-ing] for hours	5
25	[adv] for [adj] hours	158
26	[adv] for [num] hours	116
27	[adv] for [det] hours	36
28	[adv] for two hours	34
29	[adv] for two hours	34
30	[adv] for several hours	27