five times a year 一年五次
对次数提问用：how often 多久
对 five 提问用：How many times a year
如：How often / How many times a year do you visit your grandparents?
Five times a year.
不明白的再问哟,请及时采纳,多谢!我是对five 提问就用： how many times a year 一年多少次