SN4 ""

No	Pattern	Freq
1	at a [adj] [noun sg] [pers pn]	125
2	at a [adj] [noun] [pers pn]	102
3	at a [adj] [noun] [pers pn]	97
4	at a [adj] [noun] it	42
5	at a [adj -er] [noun] [pers pn]	26
6	at an [adj] [noun] [pers pn]	24
7	at a [adj] [noun] he	23
8	at a [adj] [noun] i	18
9	at a [adj] level [pers pn]	17
10	at a [adj] [noun] they	17
11	at a [adj] level [pers pn]	17
12	at a late [noun] [pers pn]	16
13	at a later [noun] [pers pn]	16
14	at a early [noun] [pers pn]	15
15	at a certain [noun] [pers pn]	13
16	at a certain [noun] [pers pn]	13
17	at a [adj] stage [pers pn]	12
18	at a early [noun] [pers pn]	12
19	at a [adj] stage [pers pn]	12
20	at a [adj] date [pers pn]	10
21	at a [adj] [noun] she	10
22	at a [adj] date [pers pn]	10
23	at a [adj] [noun] you	10
24	at a [adj] age [pers pn]	9
25	at a [adj] age [pers pn]	9
26	at a [adj] time [pers pn]	9
27	at a [adj] time [pers pn]	9
28	at a [adj] point [pers pn]	7
29	at a [adj] point [pers pn]	7
30	at a [adj] [noun] we	6