びいかめ, Length of the password Character set ...

Length of the password	Character set
Length of the password	lowercase letters	lowercase letters and digits	Both lowercase and uppercase letters	all printable ASCII characters
< = 4	instant			2 min
5	instant	2 min	12 min	4 hours
6	10 min	72 min	10 hours	18 days
7	4 hours	43 hours	23 days	4 years
8	4 days	65 days	3 years	463 years
9	4 months	6 years	178 years	44530 years
10	You should have bought a password manager! :-)

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—	Password Recovery Methods