body ... body, occurrences on page

Only 1 body element is allowed per HTML5 document.

Valid Syntax
1 body element is present
1 2 3 4 5 6 7 8 9	<!doctype html> <html> <head> <⁄head> <body> <⁄body> <⁄html>

Invalid Syntax
2 body elements are present
1 2 3 4 5 6 7 8 9 10 11 12	<!doctype html> <html> <head> <⁄head> <body> <⁄body> <body> <⁄body> <⁄html>

Note: the body element may be omitted in some cases; for more details, see body optional.