SN4 ""

No	Pattern	Freq
1	[verb] once [adv] to	69
2	[vb past] once [adv] to	26
3	[noun] once [adv] to	24
4	[noun sg] once [adv] to	20
5	turn once [adv] to	14
6	[adv] once [adv] to	12
7	return once [adv] to	11
8	[vb base] once [adv] to	11
9	[adv prt] once [adv] to	10
10	[to-vb] once [adv] to	9
11	[pron] once [adv] to	9
12	[vb pp] once [adv] to	9
13	attention once [adv] to	8
14	be once [adv] to	8
15	[be] once [adv] to	8
16	attention once [adv] to	8
17	[v-ing] once [adv] to	7
18	[was/were] once [adv] to	7
19	[pers pn] once [adv] to	6
20	turned once [adv] to	6
21	was once [adv] to	5
22	turning once [adv] to	5
23	once [verb] [adv] to	6
24	once [adv] [verb] to	56
25	once [adv] [vb pp] to	23
26	once [adv] [adj] to	11
27	once [adv] [adj] to	11
28	once [adv] [vb past] to	10
29	once [adv] [vb infin] to	8
30	once [adv] come to	7