Been second nature - Idioms by The Free Dictionary
be second nature (redirected from been second nature)
be second nature
To be something that one can do with little conscious effort. I know this data entry process seems complex now, but it'll be second nature after you do it for a few weeks.
be second ˈnature (to somebody) be something that you do automatically, without thinking about it, because you have done it for so long or so often: It took a while to learn to drive, but now it’s second nature (to me).