每两周三次 in English每两周三次,三年一次 等用英语怎么说

thrice per 2 weeks.或者说thrice each(可以简写成ea.) 2 weeks.都可以.
同理,另一个就是once per 3 years/once each 3 years.
例如:Sam go shopping once per 3 days.

每两周三次
three times every two weeks
三年一次
every three years

thrice (in) every three weeks

Three times every two weeks to three years

每两周三次
three times every two weeks
三年一次
once in three years