The company I used to work for had a snack time at three o'clock every day.
We used to have snacks every day at 3:00 p.m. at the company where I used to work.
この場合、次のような言い方ができますよ。
ーThe company I used to work for had a snack time at three o'clock every day.
「以前働いていた会社では毎日3時におやつの時間があった」
to have a snack time で「おやつの時間を持つ・おやつの時間がある」
ーWe used to have snacks every day at 3:00 p.m. at the company where I used to work.
「以前働いていた会社では毎日午後3時におやつを食べていた」
to have snacks で「おやつを食べる」
ご参考まで！
カナダ 
