diff --git a/package.json b/package.json
index b42d9e2..c13df27 100644
--- a/package.json
+++ b/package.json
@@ -19,6 +19,7 @@
   "dependencies": {
     "@radix-ui/react-dialog": "^1.1.15",
     "@supabase/supabase-js": "^2.80.0",
+    "@vercel/analytics": "^1.6.1",
     "clsx": "^2.1.1",
     "cmdk": "^1.1.1",
     "framer-motion": "^12.23.24",
diff --git a/pnpm-lock.yaml b/pnpm-lock.yaml
index c0dce56..d978830 100644
--- a/pnpm-lock.yaml
+++ b/pnpm-lock.yaml
@@ -14,6 +14,9 @@ importers:
       '@supabase/supabase-js':
         specifier: ^2.80.0
         version: 2.80.0
+      '@vercel/analytics':
+        specifier: ^1.6.1
+        version: 1.6.1(next@15.5.9(@babel/core@7.28.5)(react-dom@19.2.0(react@19.2.0))(react@19.2.0))(react@19.2.0)
       clsx:
         specifier: ^2.1.1
         version: 2.1.1
@@ -2083,6 +2086,32 @@ packages:
     cpu: [x64]
     os: [win32]
 
+  '@vercel/analytics@1.6.1':
+    resolution: {integrity: sha512-oH9He/bEM+6oKlv3chWuOOcp8Y6fo6/PSro8hEkgCW3pu9/OiCXiUpRUogDh3Fs3LH2sosDrx8CxeOLBEE+afg==}
+    peerDependencies:
+      '@remix-run/react': ^2
+      '@sveltejs/kit': ^1 || ^2
+      next: '>= 13'
+      react: ^18 || ^19 || ^19.0.0-rc
+      svelte: '>= 4'
+      vue: ^3
+      vue-router: ^4
+    peerDependenciesMeta:
+      '@remix-run/react':
+        optional: true
+      '@sveltejs/kit':
+        optional: true
+      next:
+        optional: true
+      react:
+        optional: true
+      svelte:
+        optional: true
+      vue:
+        optional: true
+      vue-router:
+        optional: true
+
   acorn-jsx@5.3.2:
     resolution: {integrity: sha512-rq9s+JNhf0IChjtDXxllJ7g41oZk5SlXtp0LHwyA5cejwn7vKmKp4pPri6YEePv2PU65sAsegbXtIinmDFDXgQ==}
     peerDependencies:
@@ -7144,6 +7173,11 @@ snapshots:
   '@unrs/resolver-binding-win32-x64-msvc@1.11.1':
     optional: true
 
+  '@vercel/analytics@1.6.1(next@15.5.9(@babel/core@7.28.5)(react-dom@19.2.0(react@19.2.0))(react@19.2.0))(react@19.2.0)':
+    optionalDependencies:
+      next: 15.5.9(@babel/core@7.28.5)(react-dom@19.2.0(react@19.2.0))(react@19.2.0)
+      react: 19.2.0
+
   acorn-jsx@5.3.2(acorn@8.15.0):
     dependencies:
       acorn: 8.15.0
diff --git a/src/app/(layout)/(shell)/(category)/[category]/_components/CategoryWidget.tsx b/src/app/(layout)/(shell)/(category)/[category]/_components/CategoryWidget.tsx
index ba2adfa..c6b079d 100644
--- a/src/app/(layout)/(shell)/(category)/[category]/_components/CategoryWidget.tsx
+++ b/src/app/(layout)/(shell)/(category)/[category]/_components/CategoryWidget.tsx
@@ -28,7 +28,6 @@ export default function CategoryWidget({ category }: Props) {
 
   return (
     <section className="flex flex-col gap-3 md:flex-row">
-      {/* 왼쪽: 숫자 위젯 4개 */}
       <div className="grid flex-1 grid-cols-2 gap-3 md:grid-cols-4">
         <StatWidget
           label="Total Posts"
@@ -36,7 +35,7 @@ export default function CategoryWidget({ category }: Props) {
           caption="전체 누적"
         />
         <StatWidget
-          label="New This Month"
+          label="This Month"
           value={`+${stats.newThisMonth}`}
           caption="이번 달 업데이트"
         />
@@ -52,7 +51,6 @@ export default function CategoryWidget({ category }: Props) {
         />
       </div>
 
-      {/* 오른쪽: Monthly Mission */}
       <div className="md:w-[260px] ">
         <MissionWidget
           current={stats.newThisMonth}
diff --git a/src/app/layout.tsx b/src/app/layout.tsx
index 7ce4ddb..ae245ab 100644
--- a/src/app/layout.tsx
+++ b/src/app/layout.tsx
@@ -2,6 +2,7 @@ import { Metadata } from "next";
 import { ThemeProvider } from "next-themes";
 import localFont from "next/font/local";
 import "./globals.css";
+import { Analytics } from "@vercel/analytics/react";
 
 export const metadata: Metadata = {
   title: "B-log",
@@ -44,6 +45,7 @@ export default function RootLayout({
         >
           {children}
         </ThemeProvider>
+        <Analytics />
       </body>
     </html>
   );
diff --git a/src/lib/posts/stats.ts b/src/lib/posts/stats.ts
index 893f5b2..1dd0d39 100644
--- a/src/lib/posts/stats.ts
+++ b/src/lib/posts/stats.ts
@@ -1,6 +1,7 @@
 import type { VelitePost } from "./source";
 import { getAllPosts } from "./queries";
 import { CategoryKey } from "@/config/categories";
+import { SERIES_META_BY_CATEGORY } from "@/lib/posts/registry/series.registry";
 
 export interface CategoryStatsParams {
   category: CategoryKey;
@@ -67,12 +68,8 @@ export function getCategoryStats(params: CategoryStatsParams): CategoryStats {
   const thisYYYYMM = toYYYYMM(now);
   const newThisMonth = catPosts.filter((p) => p.date.startsWith(thisYYYYMM)).length;
 
-  const seriesSet = new Set(
-    catPosts
-      .map((p) => p.series?.trim())
-      .filter((s): s is string => Boolean(s))
-  );
-  const seriesCount = seriesSet.size;
+  const seriesMeta = SERIES_META_BY_CATEGORY[category] ?? [];
+  const seriesCount = seriesMeta.length;
 
   const recentCount = catPosts.filter((p) =>
     isWithinLastNDays(p.date, now, activityWindowDays)