title: RxAndroid: Possible to use zip function on an array of api requests with interval or delay?
body: <p>I am playing around with RxAndroid. I have a List of Observables all of which are api requests (using Retrofit). I want to fire one of them every x seconds or milliseconds but then zip the responses together.  I seems that once I subscribe to Observable.zip(requests, someFunction) all of them are fired off at once. Any tips?</p>
  
  <p>Thanks!</p>
  
  <p>EDIT: looks like adding delaySubscription to each request maybe the answer</p>