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.
(..) Let him go. The French cannot be trusted. Everyone comfy? Biscuits? They didn't notice anything? Well, people rarely notice things right in front of their eyes, don't you find? Do you have the bonds, bishop? Yes, I do, Teacher. I have chosen an Opus Dei residence for the exchange. (..)2006 The Da Vinci Code