For me, free time is when I don't have the motivation to start something new right then and there so I look something up or work on learning a new framework/lan

For me, free time is when I don't have the motivation to start something new right then and there so I look something up or work on learning a new framework/language. It can also be when I finish work and still have 30 minutes until my train. I don't want to start on something to get interrupted but I also don't want to just sit at the train station waiting for my train.