SN4 ""

No	Pattern	Freq
31	at least [prep] the surface	8
32	at least [prep] the surface	8
33	at least [prep] the beginning	7
34	at least [prep] the united	7
35	at least [prep] the united	7
36	at least [prep] the beginning	7
37	at least [prep] the way	6
38	at least [prep] the way	6
39	at least after the [noun]	6
40	at least [prep] the west	5
41	at least [prep] the west	5
42	at least during the [noun]	5
43	at least [prep] the majority	5
44	at least [prep] the level	5
45	at least before the [noun]	5
46	at least [prep] the year	5
47	at least [prep] the majority	5