Student or Learner
Why does every go withplural periods make sense in the sentence I go swimming every two weeks.
Is every two weeks the short term of every time two weeks?
It's not the short form of anything. It's simply how we say it.
I go swimming every two weeks.
Every two weeks, I go swimming.
It simply means that you swim once in each period of two weeks.
Remember - if you don't use correct capitalisation, punctuation and spacing, anything you write will be incorrect.