SN4 ""

No	Pattern	Freq
1	[prep] once and	158
2	[prep] once and	158
3	[noun] once and	154
4	[verb] once and	142
5	at once and	139
6	at once and	139
7	[noun sg] once and	119
8	[adv] once and	74
9	[pron] once and	63
10	[pers pn] once and	54
11	[vb pp] once and	46
12	[adv] once and	40
13	[adv prt] once and	33
14	it once and	30
15	[vb past] once and	30
16	it once and	30
17	[noun pl] once and	25
18	[to-vb] once and	19
19	[art] once and	15
20	[art] once and	15
21	[v-ing] once and	14
22	[vb infin] once and	14
23	[adj] once and	14
24	out once and	14
25	out once and	14
26	[vb base] once and	13
27	a once and	12
28	a once and	12
29	only once and	11
30	for once and	11