spare moment

We know that Edward is a genius because we’re told he is; because he spends every spare moment scribbling equations on any available surface; and because he has poor people skills.

"When I tried to find out - because I'm a massive fan of his - what exactly was behind it, he would say that in every spare moment, he would fly to America and drive around America listening to different American radio stations to get ideas."

Never one to waste a spare moment, Matt Fitzgerald clambered into the second row of his Mazda CX-90 on a recent weekday morning and cracked open his MacBook so that he could work on another book.

The boys had spent every spare moment practicing with the cardboard tubes that their aunt Gertrude had given them.

I, on the other hand, spent every spare moment jamming endless lists of facts into my brain.