the animation may iterate less than one time. 0.25 and 0 are valid iteration counts

Author: estelle

css-animations/Overview.html

@@ -477,7 +477,7 @@ <h2 class="heading settled" data-level="4" id="keyframes"><span class="secno">4.
 
    <p>Keyframes are used to specify the values for the animating properties at various points
 	during the animation. The keyframes specify the behavior of one cycle of the animation;
-	the animation may iterate one or more times.</p>
+	the animation may iterate zero or more times.</p>
 
 
    <p>Keyframes are specified using a specialized CSS at-rule. A <dfn class="css" data-dfn-type="at-rule" data-export="" id="at-ruledef-keyframes">@keyframes<a class="self-link" href="#at-ruledef-keyframes"></a></dfn> rule consists of the