title: Role of frequency parameter in ts
body: <p>How does the <code>ts()</code> function use its <code>frequency</code> parameter? What is the effect of assigning wrong values as <code>frequency</code>?</p>
  
  <p>I am trying to use 1.5 years of website usage data to build a time series model so that I can forecast the usage for coming periods. I am using data at daily level. What should be the <code>frequency</code> here - 7 or 365 or 365.25?</p>