fortnightly       
adjective, adverb UK uk/ˈfɔːt.naɪt.li/ us/ˈfɔːrt.naɪt.li/
 每两周一次的
happening every two weeks
  We make a fortnightly check on supplies. 我们每两周检查一次供应情况。 
 The group meets fortnightly on Tuesdays. 该小组每两周在星期二举行一次会议。 
 See: fortnight
 - More examples
 - The evening sessions of the course will run fortnightly from 4 October.
 - The council is now proposing to switch to a fortnightly collection of rubbish.
 - She has fortnightly check-up visits with her doctor.