What Relationship To Use Between These Two Table?

Hi I have two tables:

1.) Operator
-OperatorID{PK, int, not null}
-OperatorName{varchar(100), not null}
-Enabled{bit, not null}
-PasswordChange{bit, not null}
-BirthDate{datetime, not null}

2.) Password
-PasswordID{PK, int, not null}
-Password{varchar(50), not null}
-ExpirationDate{datetime, not null}

I'm not sure how to design and layout these two tables. The layout of these two tables is completely flexible as the application has not been deployed. I'm open to any good suggestions.

For each Operator I want to stored up to 3 previous passwords plus their current password. The password change field is so that if the operator's password expires or gets reset, they will be forced to enter a new password. This is a simple internal company application, so password encrypting is not necessary. The ExpirationDate indicates the date that the password will expire.


Hope to hear from someone soon! Thank you!