The grace period for the interest free loan was one year.

免息借款的宽限期是一年。

youdao

He was offered a $10,000 interest-free loan.

他获得了一笔1万美元的无息贷款。

《柯林斯英汉双解大词典》

The best young players may get an interest-free loan from a sponsor or trust, but they will be paying it off for most of their lives.

这些最优秀的年轻演奏家也许能获得赞助商的信任或者无息贷款，但他们几乎要花费大部分的人生用以偿还提琴高昂的价格。

youdao

After he retired he made an interest-free loan to Crystie and Keith Kisler.

VOA: special.2011.01.14

The loan scheme will be open to buyers who have saved 5% of the deposit towards a property, giving them another 15% of the cost as an interest free loan.

BBC: Jersey government offers loan for house deposit

Projects are expected to pay back the money allocated through the fund in full and the estimated time scale for repaying the interest free loan is a requirement in the application process.

BBC: Finance Committee

Louis de Santangel and Gabriel Sanchez advanced an interest free loan of 17, 000 ducats from their own pockets to help pay for the voyage, as did Don Isaac Abrabanel, rabbi and Jewish statesman.

CNN: Was Columbus secretly a Jew?