title: Can r time series have frequencies greater than a year?
body: <p>I'm working with political data based on US Presidential elections, so dates of my values are set four years apart (ie 1980, 1984, 1988, 1992, etc.) However, so far I've only seen examples of time series frequencies being set from anywhere from day to day, month to month, quarterly and annually. Will frequencies of every four years event work? </p>
  
  <p>Thanks!</p>