diff --git a/source b/source
index f07670a3d31..72635d08449 100644
--- a/source
+++ b/source
@@ -67110,7 +67110,7 @@ document.body.append(parent);
 
    <dt>A collection of <dfn
    data-x="concept-custom-element-definition-lifecycle-callbacks">lifecycle callbacks</dfn></dt>
-   <dd>A map, whose four keys are the strings "<code data-x="">connectedCallback</code>",
+   <dd>A map, whose keys are the strings "<code data-x="">connectedCallback</code>",
    "<code data-x="">disconnectedCallback</code>", "<code data-x="">adoptedCallback</code>",
    "<code data-x="">attributeChangedCallback</code>",
    "<code data-x="">formAssociatedCallback</code>",
@@ -67332,13 +67332,13 @@ dictionary <dfn>ElementDefinitionOptions</dfn> {
      <li><p>If <span data-x="js-Type">Type</span>(<var>prototype</var>) is not Object, then throw a
      <code>TypeError</code> exception.</p></li>
 
-     <li><p>Let <var>lifecycleCallbacks</var> be a map with the four keys "<code
+     <li><p>Let <var>lifecycleCallbacks</var> be a map with the keys "<code
      data-x="">connectedCallback</code>", "<code data-x="">disconnectedCallback</code>", "<code
      data-x="">adoptedCallback</code>", and "<code data-x="">attributeChangedCallback</code>", each
      of which belongs to an entry whose value is null.</p>
 
      <li>
-      <p>For each of the four keys <var>callbackName</var> in <var>lifecycleCallbacks</var>, in the
+      <p>For each of the keys <var>callbackName</var> in <var>lifecycleCallbacks</var>, in the
       order listed in the previous step:</p>
 
       <ol>