SN4 ""

No	Pattern	Freq
1	[be] once the [adj] [noun]	30
2	be once the [adj] [noun]	30
3	[was/were] once the [adj] [noun]	30
4	was once the [adj] [noun]	26
5	[conj] once the [adj] [noun]	24
6	[prep] once the [adj] [noun]	18
7	[prep] once the [adj] [noun]	18
8	at once the [adj] [noun]	14
9	[coord] once the [adj] [noun]	14
10	at once the [adj] [noun]	14
11	[verb] once the [adj] [noun]	13
12	but once the [adj] [noun]	11
13	but once the [adj] [noun]	11
14	[subord] once the [adj] [noun]	10
15	[noun] once the [adj] [noun]	7
16	[adv] once the [adj] [noun]	6
17	[vb infin] once the [adj] [noun]	5
18	[adv] once the [adj] [noun]	5
19	once [prep] the [adj] [noun]	92
20	once [prep] the [adj] [noun]	92
21	once [verb] the [adj] [noun]	58
22	once [adv] the [adj] [noun]	58
23	once [adv] the [adj] [noun]	58
24	once again the [adj] [noun]	47
25	once again the [adj] [noun]	47
26	once in the [adj] [noun]	37
27	once in the [adj] [noun]	37
28	once [vb past] the [adj] [noun]	33
29	once [vb pp] the [adj] [noun]	17
30	once on the [adj] [noun]	13