For things that have had contents with volatile oil like thinners they should be left for a few days to completely evaporate it before being disposed of as non-flammable waste.
彼女は数日間そのホテルに滞在した。
She stayed at the hotel for several days.
彼は友達の車を数日間借りた。
He borrowed his friend's car for a few days.
彼は数日間休暇を取っている。
He is off work for a few days.
彼は数日間意識不明であった。
He was unconscious for several days.
数日間暑い日が続いた。
The weather stayed hot for a few days.
数日間雨が降り続いた。
It rained for several days on end.
数日間ここを離れるべきだと思います。
I think we should get away from here for a few days.
私は数日間東京から離れたい。
私は数日間休みを取ります。
I'm taking a couple of days off.
これらの船は数日間低気圧の中にいることができるくらい速く走れる。
These sea boats are fast enough to stay in a depression for several days.
ここ数日間、ジェーンは口も利かず不機嫌だ。
For the past few days Jane has been quiet and out of humor.