Line 2:1·"Types" is not a recognised heading for this article type.
Biographical Lifespan
suggestion
"History and etymology"
Line 9:1·A bold element in the History and etymology section should be a person; it would be useful to have their lifespan details: '<h4>History and etymology</h4> <p>It is thought to have been first used by <strong>Jackson and Waugh</strong> '