余暇

wǒ lì yòng yú xiá shí jiān dú shū

我利用余暇时间读书。

I make use of one's spare time reading.

wǒ lì yòng yú xiá shí jiān zhuàn qián

我利用余暇时间赚钱。

I convert one's spare time into money.

tā yòng yú xiá xiě le yī xiē jiǎn duǎn de gù shi

他用余暇写了一些简短的故事。

In his spare time he wrote some short stories.