When do you have time, professor?
Are there any available spots for a checkup this afternoon?
Superman then asked Aquaman the most serious question, "Do we have enough time to go on the waterslides again?"
The time interval of time is just the time. As is often the case, if two similar meaning kanji are combined into one word, they tend to produce a word with a similar meaning. Excuse me, friend, what's the 時間?
This is a jukugo word, which usually means on'yomi readings from the kanji. If you know the readings of your kanji you'll know how to read this as well.