I fold my laundry several different times because it's too much to do all at once.
I don't fold all my laundry at once because there's so much of it.
ーI fold my laundry several different times because it's too much to do all at once.
「一度でたたむのは多すぎるので、洗濯物を何度かに分けてたたむ。」
fold one's laundry で「洗濯物をたたむ」
all at once で「一度に」
ーI don't fold all my laundry at once because there's so much of it.
「たくさんありすぎるから、洗濯物を一度にたたまない。」
一度にたたまない＝何度かに分ける、という言い方もできますね。
ご参考まで！
カナダ 
