After a while, she 'got into the swing of' her job. [=she got used to her job and was able to do it well]
They have to be ready to 'swing into action' [=to start doing something quickly] at a moment's notice.
She needs to work on her (golf) 'swing'. [=she needs to practice the way she swings a golf club]
(..) Rose? Rose? My God. - How did you get over there? - Where is she? Grab onto it. - Now swing back around. - Okay. - Are you all right? - Yeah. What the hell were you doing over there? (..)2006 Silent Hill