SN4 ""

No	Pattern	Freq
1	[noun] [conj] had once	93
2	[noun sg] [conj] had once	64
3	[noun pl] [conj] had once	25
4	room [conj] had once	6
5	[adj] [conj] had once	6
6	room [conj] had once	5
7	[conj] [pron] had once	109
8	[conj] [pers pn] had once	93
9	[conj] [noun] had once	46
10	[conj] he had once	41
11	[conj] he had once	41
12	[conj] [noun prp] had once	32
13	[conj] she had once	25
14	[conj] she had once	25
15	[conj] it had once	13
16	[conj] it had once	13
17	[conj] they had once	10
18	[conj] they had once	10
19	[conj] [noun sg] had once	9
20	[conj] what had once	7
21	[conj] [Wh det] had once	7
22	[conj] what had once	7
23	[conj] [ex0] had once	6
24	[conj] there had once	6
25	[conj] there had once	6
26	[conj] [noun pl] had once	5
27	[conj] had once [been]	55
28	[conj] had once be	55
29	[conj] had once been	55
30	[conj] had once [be]	55