These machines only need to be fixed very 'rarely'. = These machines 'rarely' need to be fixed.
Such radical opinions have 'rarely', 'if ever', been heard here before.
The temperature 'rarely' [='seldom'] drops below freezing here.
(..) and rub against each other. You heard it all through the house because of these pipes leading to the radiator. So this place isn't haunted? No, it rarely is. Yeah, there's usually always some kind of rational explanation. Girls, it's way past your bedtime. Who is that? Who's ever down there, (..)2013 The Conjuring