N-PLURAL
九十多;九十几
When you talk about the nineties, you are referring to numbers between 90 and 99. For example, if you are in your nineties, you are aged between 90 and 99. If the temperature is in the nineties, the temperature is between 90 and 99 degrees.
例句
By this time she was in her nineties and needed help more and more frequently.
到这个时候她已经90多岁了，越来越频繁地需要帮助。