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.
(..) to attempt to treat him? I seem to remember you. - But you treated him anyway? - I did, yes. I forbade it because it is dangerous and rarely successful, especially on someone of that age. You could have infected yourself and others. You could have devastated (..)2017 TvShow: Game of Thrones Title: The Queen's Justice Season: 7 Episode 3