a 'minimum security prison' [=a prison in which prisoners are allowed more freedom than in most other prisons because they are not considered dangerous or likely to escape]
Ten years is the 'minimum' needed. = We'll need 10 years 'at a/the minimum'. [=we'll need at least 10 years]
We need to keep expenses 'to a (bare) minimum'. [=we need to keep expenses as low as possible]
(..) I mean, there is no car wash in the world that could do this kind of business. I mean, this is month's work here minimum. million? That could take years. So set some aside. Save it for a rainy day. Save it. What-- (..)2011 TvShow: Breaking Bad Title: Problem Dog Season: 4 Episode 7