The given translation of « Mes sœurs ne font guère les magasins » is "My sisters hardly go shopping". This is not idiomatic in English; you would say "My sisters hardly ever go shopping". In English, we would use "hardly" on its own to imply some limitation in the action; for example, "He can hardly write (because he is only 4 years old)". But if the limitation is to do with time, then the correct expression is "hardly ever"; for example, "He hardly ever writes (because he's busy doing other things)".
I think in the article on ne ... guère, this distinction should be made. As it stands, "hardly ever" isn't mentioned at all.
How would this distinction be made in French?