title: RxSwift - How to call method which returns Driver at regular intervals?
body: <p>I am a RxSwift beginner and making a app with RxSwift + MVVM.</p>
  <p>I have a method which calls API and converts to RxCocoa.Driver in ViewModel class like below.</p>
  <pre class="lang-swift prettyprint-override"><code>    func fetch() -&gt; Driver&lt;HomeViewEntity&gt; {
          apiUseCase.fetch(query: HomeViewQuery())
              .map { data in
                  HomeViewEntity(userName: data.name,
                                 emailAddress: data.email
              }
              .asDriver(onErrorRecover: { [weak self] error in
                  if let printableError = error as? PrintableError {
                      self?.errorMessageRelay.accept(AlertPayload(title: printableError.title, message: printableError.message))
                  }
  
                  return Driver.never()
              })
  
      }
  </code></pre>
  <p>Now, I'd like to call this <code>fetchListPlace()</code> method at regular intervals a.k.a polling (e.g. each 5 minutes) at ViewController.</p>
  <p>How to do that????</p>
  <p>I think <code>interval</code> is suit in this case, but I can't get an implementation image....</p>