Every day能回答how long吗

Every 是频次的用法， 对应 how often

数字才对应 how long ，例如 one day , two days , one week 等

是回答how often
how often 问的是频率
how long 问到是时间段的长短

是用how often 来提问,every week回答这样吧..
总之两个是搭配使用的
虽然how often 和how long都表示时间的提问,但是how long修饰的是一个连续的时间段,而how often 则不是

how often