diff --git a/backend/scripts/link_articles.py b/backend/scripts/link_articles.py
index 07bf8b3..352a3c6 100644
--- a/backend/scripts/link_articles.py
+++ b/backend/scripts/link_articles.py
@@ -19,6 +19,9 @@ stop clicking. The rule now:
   3. **Hub terms link from lists only.** A title mentioned across more than
      HUB_SHARE of all articles is too general to be worth a jump from prose.
      It still links as a list item, where it is something you might pick.
+     Measure this on clean prose: counting mentions in text that is already
+     linked hides most of them behind markers the word pattern will not match,
+     which made the corpus look four times less repetitive than it is.
   4. **Specific beats general.** Longest title first, and a marker once made is
      protected, so "Otitis media with effusion" cannot be re-cut into
      "Otitis media".
@@ -48,7 +51,10 @@ from app.models.article import Article
 
 MIN_TITLE = 4
 #: A title mentioned in more than this share of articles links from lists only.
-HUB_SHARE = 0.25
+#: At 5% of 333 articles that is 23 terms — Seizures (mentioned in 50), Sepsis
+#: (46), Pneumonia (34), Respiratory Distress (34) and the like: the vocabulary
+#: of paediatrics rather than a topic anyone would break off reading to visit.
+HUB_SHARE = 0.05
 #: Terms that are never worth a jump, however specific the match looks.
 NEVER_LINK = {"history", "examination", "management", "treatment", "prognosis"}
 
@@ -60,8 +66,6 @@ TABLE = re.compile(r"^\s*\|")
 FENCE = re.compile(r"^\s*(```|~~~)")
 LIST_ITEM = re.compile(r"^\s*([-*+]|\d+[.)])\s")
 
-LEAD = "__lead__"  # summary and the whole-article introduction
-
 
 def word_pattern(title: str) -> re.Pattern:
     """Whole-word, case-insensitive, and never biting into an existing marker."""