SN4 ""

No	Pattern	Freq
1	[adj] [noun] at a time	859
2	[num] [noun] at a time	523
3	one [noun] at a time	326
4	one [noun] at a time	326
5	[adj] [noun] at a time	237
6	[prep] [noun] at a time	203
7	[prep] [noun] at a time	203
8	[art] [noun] at a time	191
9	[art] [noun] at a time	191
10	a [noun] at a time	118
11	a [noun] at a time	104
12	[noun] [noun] at a time	102
13	[det] [noun] at a time	95
14	[noun sg] [noun] at a time	83
15	of [noun] at a time	74
16	of [noun] at a time	74
17	for [noun] at a time	73
18	for [noun] at a time	73
19	the [noun] at a time	73
20	the [noun] at a time	73
21	[verb] [noun] at a time	54
22	few [noun] at a time	42
23	few [noun] at a time	42
24	[pron] [noun] at a time	41
25	[pos pn] [noun] at a time	39
26	three [noun] at a time	34
27	three [noun] at a time	34
28	two [noun] at a time	34
29	two [noun] at a time	34
30	in [noun] at a time	22