SN4 ""

No	Pattern	Freq
1	[pron] had once be	229
2	[Wh det] had once be	95
3	[pers pn] had once be	89
4	[noun] had once be	66
5	[conj] had once be	55
6	what had once be	55
7	what had once be	55
8	that had once be	49
9	that had once be	49
10	[that] had once be	49
11	which had once be	40
12	which had once be	40
13	[noun sg] had once be	39
14	who had once be	34
15	who had once be	34
16	[Wh pn] had once be	34
17	it had once be	33
18	it had once be	33
19	he had once be	25
20	he had once be	25
21	she had once be	20
22	she had once be	20
23	[noun pl] had once be	13
24	[noun prp] had once be	12
25	they had once be	10
26	there had once be	9
27	there had once be	9
28	[ex0] had once be	9
29	they had once be	8
30	had [adv] once be	8