fix(content): modify info note to clarify initial vs. frequency

Author: JasonSooter

src/_includes/content/sync-frequency-note.md

@@ -1,3 +1,7 @@
-<div class="premonition info"><div class="fa fa-info-circle"></div><div class="content"><p class="header">Real-time to batch destination sync frequency</p><p> Note that real-time audience syncs to {{page.title| replace: "Destination", " "}} might take two to three hours.</p>
-
-</div></div>
+<div class="premonition info">
+  <div class="fa fa-info-circle"></div>
+  <div class="content">
+    <p class="header">Real-time to batch destination sync frequency</p>
+    <p>Note that real-time audience syncs to {{page.title| replace: "Destination", " "}} may take six or more hours for the initial sync to complete. Upon completion, a sync frequency of two to three hours is expected.</p>
+  </div>
+</div>