Temporary
Provisional
noun, の adjective
Look to time to see how much longer this will last. It's not forever, it's temporary, which is why we must look to time to figure out how much longer it'll be around.
This is a jukugo word that uses the on'yomi readings of the kanji. You should be able to read this on your own.
マミは、臨時のボーナスが出たので、さらにベーコンを購入した。
Mami got an extra bonus, so she bought more bacon.