SN4 ""

No	Pattern	Freq
1	at [adj] stage	3280
2	at [det] stage	2959
3	at this stage	1845
4	at this stage	1845
5	at that stage	392
6	at that stage	392
7	at [adj] stages	372
8	at [num] stage	367
9	at one stage	361
10	at one stage	361
11	at some stage	315
12	at some stage	315
13	at [adj] stage	292
14	at any stage	168
15	at any stage	168
16	at each stage	128
17	at each stage	128
18	at all stage	93
19	at all stage	93
20	at different stage	92
21	at different stage	92
22	at key stage	81
23	at key stage	81
24	at various stage	57
25	at various stage	57
26	at [adj -er] stage	32
27	at late stage	22
28	at later stage	21
29	at early stage	14
30	at earlier stage	11