I visit my grandparents once a

I visit my grandparents once a week.
How often do you visit your grandparents.
我每周拜访一次我的爷爷.
你多久拜访一次你的爷爷. 再答： I visit my grandparents once a week.
How often do you visit your grandparents.
我每周拜访一次我的爷爷奶奶。
你多久拜访一次你的爷爷奶奶。