As to use occasions, ordinary people or those discommodious to greet directly can be called "teachers".

在使用场合方面，对不方便称呼的人和普通人都可以称为“老师”。

youdao

I only use that on special occasions, so it's as good as new.

我只在特殊场合用，所以它完好如新。

《柯林斯英汉双解大词典》

We also use the money in this jar to give to family and friends on birthdays, special occasions and holidays.

我们还用这个罐子里的钱给家人和朋友送生日礼物、特殊场合礼物以及假期礼物。

youdao

She has one of those lightweight portable wheelchairs to use for these occasions and it really helped.

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Whatever individual discretion they use on some occasions they follow the crowd as if that was the only discretionary power they had.

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Room attendants told us they felt they had no other option but to use the bathroom towels on occasions.

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