SN4 ""

No	Pattern	Freq
1	become clear	75
2	become accustomed	71
3	become aware	67
4	become involved	61
5	become apparent	55
6	become available	46
7	become used	45
8	become popular	34
9	become extinct	29
10	become common	26
11	become necessary	21
12	become possible	21
13	become interested	20
14	become big	20
15	become synonymous	19
16	become familiar	18
17	become fashionable	18
18	become commonplace	18
19	become famous	15
20	become concerned	14
21	become difficult	14
22	become customary	14
23	become evident	14
24	become obvious	13
25	become obsessed	13
26	become convinced	13
27	become impossible	12
28	become important	12
29	become pregnant	12
30	become widespread	11